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Question Number 1

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcopy(temp, str1);
    strcopy(str1, str2);
    strcopy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcopy(temp, str1); strcopy(str1, str2); strcopy(str2, temp);

printf("Enter the str2 string\n"); scanf("%s", str2);

printf("Enter the str1 string\n"); scanf("%s", str1);

No change needed, program will give the correct output.

Question Number 2

Give the output of the following code snippet :

#define SWAP(a,b,c)(c=a,a=b,b=c)
void main()
{
    int a=3,b=10,c=5;
    SWAP(a,b,c);
    printf("%d %d",a,b);
}

10 3

3 10

No output

Compilation error

Question Number 3

Give the output of the following code :


#define Message "Hello World";

int main()
{

    printf("%s\n",Message);
    return 0;
}

Hello World

Compiler error

No output

None of the above

Question Number 4

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2, temp;

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

char str1[100], str2, temp;

scanf("%s", str2);

No change needed, program will give the correct output.

Question Number 5

Give the output of the following code snippet :

#define FUN(i, j) i##j

int main()
{
    int va1=10;
    int va12=20;
    printf("%d\n", FUN(va1, 2));
    return 0;
}

10 20

Question Number 6

The following program is used to find length of a string without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

length = string_length();

length = string_length(str[100]);

length = string_length(str);

No change needed, program will give the correct output.

Question Number 7

Give the output of the following code snippet : Assume input is given as x=20

void main()
{
    int x=1;
    int i=0;
    int n2=scanf("%d",&x);
    for(i=0; i< n2; i++)
    {
        printf("Hello");
    }
}

20
HelloHello

1
HelloHello

20
Hello

Question Number 8

Which of the following statements is true about EOF in C?

It is a symbolic constant.

It is defined in the header file stdio.h

The value of EOF is typically 1.

Both 1 and 2

Question Number 9

The following program is used to find the factorial of a number. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        if ( count ==  n)
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

if ( count == n)

fact = fact * count;

if (n< 0)

No change needed, program will give the correct output.

Question Number 10

The following program is used to find the GCD and LCM of two numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x + y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

temp = b;

gcd = a;

lcm = (x + y) / gcd;

No change needed, program will give the correct output.

Question Number 11

What is the difference between the printf() and the fprintf() functions?

fprintf() takes the file pointer as the first argument.

fprintf() takes the file name as the first argument.

fprintf() does not return any value.

All of the above.

Question Number 12

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    if (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

if (b != 0)

b = a % b;

No change needed, program will give the correct output.

Question Number 13

The putchar(c) function always outputs character c to the

Screen

Standard output

Depends on the compiler

None of the above.

Question Number 14

The following program is used to find the substring in a string without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        sub[count] = str[position + count - 1];
        count++;
    }
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = str[position + count - 1];

count++;

sub[count] = '\0';

No change needed, program will give the correct output.

Question Number 15

The following program is used to copy a file. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");
    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

target = fopen("Destination.txt", "w");

while ((ch = fgetc(source)) != EOF)

fputc(ch, target);

No change needed, program will give the correct output.

Question Number 16

What does the printf() function return?

Number of characters printed.

No of arguments taken as input.

Either 1 or 2

None of the above

Question Number 17

Give the output of the following code snippet :

int main(int argc, char **argv)
{
    char s[10] = "Hello";
    int i = 4;
    printf("%10.*s", i, s);
}

Hello

Hell

Hello [Note : 5 spaces to the left of Hello]

Hell [Note : 6 spaces to the left of Hell]

Question Number 18

Which of the following represents the function for scanf?

void scanf(char *format, …)

int scanf(char *format, …)

char scanf(int format, …)

char *scanf(char *format, …)

Question Number 19

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            temp = arry[d];
            arry[d] = arry[d + 1];
            arry[d + 1] = temp;

        }
    }
}

for (c = 0; c < (n + 1); c++)

for (d = 0; d < n - c + 1; d--)

if (arry[d] > arry[d + 1])

No change needed, program will give the correct output.

Question Number 20

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str2);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str2);

strcpy(str1, str2);

strcpy(str2, temp);

No change needed, program will give the correct output.

Question Number 21

Give the output of the following code snippet :

void main()
{
    int a = 2 + 3 - 4 + 8 -  5 % 4;
    printf("%d\n", a);
}

Question Number 22

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {

                arry[d-1] = arry[d];
                arry[d] = arry[d + 1];
                arry[d + 1] = temp;
            }
        }
    }
}

arry[d-1] = arry[d];

arry[d] = arry[d + 1];

arry[d + 1] = temp;

No change needed, program will give the correct output.

Question Number 23

Give the output of the following code snippet :

#define MAX 1000
int main()
{
    int MAX = 100;
    printf("%d ", MAX);
    return 0;
}

100

Compiler error

1000

Question Number 24

Give the output of the following code snippet :

#define MAX(a, b) (a > b ? a : b)

int main()
{
    int x;
    x = MAX(3+3, 2+5);
    printf("%d\n", x);
    return 0;
}

Question Number 25

In printf function in C, which is the format specifier used to print decimal values?

Question Number 26

The following program is used to generate the palindrome of a number. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = 0;

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = 0;

while (num != 0)

reverse = reverse * 10;

No change needed, program will give the correct output.

Question Number 27

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    d[count] = '\0';
}

while (s[count] == '\0') { d[count] = s[count]; count++; }

while (s[count] != '\0') { d[count] = count; count--; }

while (s[count] != '\0') { d[count] = s[count]; count++; }

No change needed, program will give the correct output.

Question Number 28

The following program is used to find the GCD and LCM of two numbers. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

lcm = (x*y) / gcd;

lcm = (x%y) / gcd;

lcm = (x*y) / a;

No change needed, program will give the correct output.

Question Number 29

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fopen(ft)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fopen(ft)) != EOF)

fs2 = fopen("File2.txt", "r");

if (ft == NULL)

No change needed, program will give the correct output.

Question Number 30

The following program is used to find the maximum value in an array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (count = 1; count <  size; count++)
    {
        if (array[count] > maximum)
        {
            maximum = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

if (array[count] > maximum)

maximum = array[0];

maximum = array[count];

No change needed, program will give the correct output.

Question Number 31

Give the output of the following code snippet :

int x=10;
void main()
{
    {
        int x=20;
        x+=10;
        printf("%d ",x);
    }
    x=x+10;
    printf("%d",x);
}

20 40

20 30

30 40

30 20

Question Number 32

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);
    {
        sub[count] = str[position + count - 1];
        count++;
    }
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

while (count < length)

while (count == length)

while (count != length)

No change needed, program will give the correct output.

Question Number 33

Give the output of the following code snippet :

void func(int a)
{
    int a=200;
    printf("%d",a);
}
void main()
{
    func(10);
}

200

No output

Compilation error

Question Number 34

What is the use of getchar()?

The next input character each time it is called.

EOF when it encounters end of file.

Both 1 and 2

None of the above

Question Number 35

Give the output of the following code snippet :

#define func(x, y) x + y - x
int main()
{
    int i = 3, j = 3;
    printf("%d\n",func(i*j, 2));
    return 0;
}

Compilation error

Question Number 36

The following program is used to copy a file. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }
    fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

if((ch = fgetc(source)) != EOF)

while ((ch = fgetc(source)) == EOF)

while ((ch = fgetc(source)) != EOF)

No change needed, program will give the correct output.

Question Number 37

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    copy_str(dest, str);
    printf("Input a string\n");
    scanf("%s",str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        count++;
    }
    d[count] = '\0';
}

d[count] = s[count];

copy_str(dest, str);

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 38

Which of the following correctly shows the hierarchy of arithmetic operations in C?

+ - / *

/ * + -

* + - /

- / + *

Question Number 39

The following program is used to swap two values. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    value2 = temp;
    temp = value1;
    value1 = value2;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

value2 = temp;

scanf("%d", &value2);

value1 = value2;

No change needed, program will give the correct output.

Question Number 40

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != 0)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) != 0)

fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF)

No change needed, program will give the correct output.

Question Number 41

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {

                temp = arry[d];
                arry[d] = arry[d + 1];
                arry[d + 1] = arry[d - 1];
            }
        }
    }
}

temp = arry[d + 1];

arry[d] = arry[d + 1];

arry[d + 1] = arry[d - 1];

No change needed, program will give the correct output.

Question Number 42

The following program is used to compare two strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (a[count] == '\0' || b[count] == '\0') break;

if (a[count] == '\0') break;

if (a[count] == '\0' || b[count] == '\0')

No change needed, program will give the correct output.

Question Number 43

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == 0)
    {
        perror("Error ");
        break;
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF) fputc(ch, ft);

if (ft == 0) { perror("Error "); break; }

No change needed, program will give the correct output.

Question Number 44

What type of argument needs to be passed to the getc() function in C?

int

char

string

file pointer.

Question Number 45

int string_length(char[]);

int main()
{
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

char str[100];

void str[100];

char str;

No change needed, program will give the correct output.

Question Number 46

Which of the following statements is true about the scanf() function in C?

It reads the characters from the standard input.

Stops execution when it exhausts the format string.

It does not return any value.

Both 1 and 2

Question Number 47

The following program is used to check if the given number is odd or even. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int value;
    printf("Enter the value to be checked : ");
    scanf("%d", &value);
    if ((value % 2) == 0)
        printf("%d is even", value);
    else  if ((value / 2) == -1)
        value++;
    else
        printf("%d is odd ", value);

    return 0;
}

if ((value % 2) == 0) printf("%d is even", value);

else if ((value / 2) == -1) value++;

else printf("%d is odd ", value);

No change needed, program will give the correct output.

Question Number 48

The following program is used to merge two arrays into a single array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

for (; i < num1 + num2;)

for (i=0 ; i < num1 + num2;i++)

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 49

Give the output of the following code snippet:

void main()
{
    printf("Print value   %d", 12.8);
}

Print value 12

Print value 12.8

Print value 0

None of the above

Question Number 50

The following program is used to sort an array of structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud;
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

temp = stud;

stud[i] = stud[j];

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 51

Expressions connected by logical operators && and || are evaluated from

Right to Left

Left to Right

Either 1 or 2

None of the above.

Question Number 52

Give the output of the following code snippet :

#define MIN(x,y) (x< =y?x:y);

void main()
{
    int a=9,b=10,d;
    d=MIN(a++,--b);
    printf("%d",d);
}

Compilation error

Question Number 53

The following program is used to swap two values. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1;
    value1 = value2;
    value2 = temp;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1;

value1 = value2;

value2 = temp;

No change needed, program will give the correct output.

Question Number 54

The following program is used to merge two arrays into a single array. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] == arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

else if (j == num1)

if (arry1[j] == arry2[k])

if (j < num1 && k < num2)

No change needed, program will give the correct output.

Question Number 55

The following program is used to generate the palindrome of a number. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

num = value;

reverse = reverse * 10;

reverse = reverse + num % 10;

No change needed, program will give the correct output.

Question Number 56

Which function is used to generate a sequence of pseudo-random integers from a specified range?

random()

rand()

srandom()

All of the above.

Question Number 57

The following program is used to delete a file. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int status;
    status = remove("Input.txt");

    if (status == 0)
        printf("File has been deleted successfully\n");
    else
    {
        printf("Unable to delete the file\n");
        perror("Error");
    }
    return 0;
}

int status;

status = remove("Input.txt");

if (status == 0)

No change needed, program will give the correct output.

Question Number 58

Give the output of the following code snippet :

void main()
{
    int x=1,y=2;
    int a=x&y;
    int b=x&&y;
    printf("%d %d",a,b);
}

0 1

0 0

1 0

1 1

Question Number 59

Give the output of the following code snippet :

#include (stdio.h)

void main()
{
    printf("Hello");
}

Hello

No output

Compiler error

None of the above.

Question Number 60

Give the output of the following code snippet :

int main()
{
    int i = 10, j = 20;
    printf("%d %d %d", i, j);
}

10 20 0

10 20

10 20 Garbage value

Compilation error

Question Number 61

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");


    return 0;
}

fclose(source); fclose(target);

fclose();

fclose(source,target);

No change needed, program will give the correct output.

Question Number 62

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count <  n - 1; count++)
            array[count] = array[count + 1];

        printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

for (count = 0; count < n; count++) scanf("%d", &array[count]);

for (count = 0; count = n; count++) scanf("%d", &array[count]);

for (count = 0; count > n; count++) scanf("%d", &array[count]);

No change needed, program will give the correct output.

Question Number 63

Give the output of the following code snippet :

void func(int a);
void main()
{
    func(10);
    printf("%d",a);
}

No output

Compilation error

Question Number 64

Which of the following statements is true about the function sprintf():

It works similar to the printf() function.

Stores the output in a string.

String must be large enough to receive the output.

All of the above.

Question Number 65

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        ++count;
        printf("%d ", result);
    }
    num1 = num2;
    num2 = result;
    return 0;
}

result = num1 + num2;

num1 = num2; num2 = result;

while (count< n)

No change needed, program will give the correct output.

Question Number 66

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str();

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        count++;
    }
    d[count] = '\0';
}

while (s[count] != '\0')

d[count] = s[count];

copy_str();

No change needed, program will give the correct output.

Question Number 67

The following program is used to check if the given number is a prime number or not. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int value, i, flag = 0;
    printf("Enter a positive value: ");
    scanf("%d", &value);
    for (i = 2; i < = value % 2; ++i)
    {
        if (value % i == 0)
        {
            flag = 1;
            break;
        }
    }
    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

scanf("%d", &value);

for (i = 2; i < = value % 2; ++i)

if (flag == 0)

No change needed, program will give the correct output.

Question Number 68

Right shifting an unsigned quantity, always filled the vacated bits with :

Value occupying the last bit.

Depends on the compiler.

Question Number 69

The following program is used to find the GCD and LCM of two numbers. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;
    gcd = a;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

b = a % b;

a = temp;

gcd = a;

No change needed, program will give the correct output.

Question Number 70

The following program is used to print the effective username of the current user when invoked. Which of the following statement(s) given in the choices should be added to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < stdlib.h>


int main()
{
    return 0;
}

system("C:\\WINDOWS\\System32\\user");

system("C:\\WINDOWS\\System32\\user_name ");

system("C:\\WINDOWS\\System32\\whoami ");

No change needed, program will give the correct output.

Question Number 71

Which keyword specifies the range of positive and negative values that can be assigned for the character data type?

long

signed

short

All of the above

Question Number 72

Give the output of the following code snippet :

int main()
{
    char c = 'H';
    putchar(c);
}

Output 'H' is printed on the screen.

No output

Compiler error.

Garbage value

Question Number 73

Binary operators * and / have what priority?

Same

* has greater priority than /

/ has greater priority than *

None of the above.

Question Number 74

Give the output of the following code snippet :

#define CUBE(x)(x*x*x)
#define CUBE(x)(x+x+x)
void fun()
{
    int x=2;
    int y=CUBE(x);
    printf("%d ",y);
}
void main()
{
    int a=3;
    int b;
    fun();
    b=CUBE(a+3);
    printf("%d",b);
}

8 12

6 18

8 24

Compilation error

Question Number 75

What is the return type of rand() function?

short

int

long

double

Question Number 76

Give the output of the following code snippet :

int x;
float y;
void main()
{

    printf("%d %.2f",x,y);
}

0 0.00

Garbage values

No output

Compilation error

Question Number 77

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        count++;
    }

    str1[count] = '\0';
}

str1[count] = str2[d]; d++;

str1[count] = str[count+1]; d++;

str1[count] = str2[d]; d--;

No change needed, program will give the correct output.

Question Number 78

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    if (j <  num1 && k <  num2)
    {

        if (arry1[j] <  arry2[k])
        {
            result[i] = arry1[j];
            j++;
        }
        else
        {
            result[i] = arry2[k];
            k++;
        }
        i++;
    }

    else if (j == num1)
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry2[k];
            k++;
            i++;
        }
    }

    else
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry1[j];
            j++;
            i++;
        }

    }
}

for (i = 0; i < num1 + num2;)

for (i = 0; i < num1 + num2; i++)

if (j == num1)

No change needed, program will give the correct output.

Question Number 79

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source;

source = fopen("CopyFile.txt","r");

fclose(target);

No change needed, program will give the correct output.

Question Number 80

Give the output of the following code snippet :

extern int x=10;
void main()
{
    int x=30;
    {
        x+=10;
        printf("%d ",x);
    }
    printf("%d",x);
}

30 30

40 40

30 40

40 30

Question Number 81

The following program is used to compare two strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == str1)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (flag == str1)

while (a[count] == b[count])

if (a[count] == '\0' && b[count] == '\0')

No change needed, program will give the correct output.

Question Number 82

The C pre-processors are specified with which symbol?

" "

None of the above

Question Number 83

Which of the following statements is true about the function srand()?

Sets the seed for rand.

Helps to generate a random value.

Is defined in the header file stdib.h

All of the above.

Question Number 84

The following program is used to find the substring in a string without using string function. Which of the following statement(s) given in the choices should reordered to make the program compile, link and run and give the desired output?

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        count++;
    }
    sub[count] = '\0';
    sub[count] = str[position + count - 1];

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

sub[count] = str[position + count - 1];

count++;

No change needed, program will give the correct output.

Question Number 85

The following program is used to find the substring in a string without using string function. Which of the following statement(s) given in the choices should corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        str[count] = sub[position + count - 1];
        count++;
    }
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

scanf("%d%d", &position, &length);

str[count] = sub[position + count - 1];

No change needed, program will give the correct output.

Question Number 86

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

while (num < = 0)

while (num == 0)

while (num != 0)

No change needed, program will give the correct output.

Question Number 87

What is the default return-type of function putchar()?

char

int

char

double

Question Number 88

Which of the following cannot be used with ungetc?

scanf

getc

getchar

printf

Question Number 89

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

temp = b;

gcd = a;

lcm = (x*y) / gcd;

No change needed, program will give the correct output.

Question Number 90

Substitution of macros do not take place within quoted strings. State true or false :

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 91

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

temp = a+b;

temp = b;

a = b;

No change needed, program will give the correct output.

Question Number 92

Give the output of the following code :

int main()
{
    int i=4, j=-1, k=0, w, x, y;
    w = i || j || k;
    x = i && j && k;
    y = i || j &&k;

    printf("%d, %d, %d, %d\n", w, x, y);
    return 0;
}

1,0,0

1,0,1

0,0,1

0,1,0

Question Number 93

Give the output of the following code snippet :

void main()
{
    func(10);
}
void func(int a)
{
    a=200;
    printf("%d",a);
}

200

Compilation error

Question Number 94

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 - num2; i++)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

result[i] = arry2[k];

for (i = 0; i < num1 - num2; i++)

else if (j == num1)

No change needed, program will give the correct output.

Question Number 95

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

source = fopen(CopyFile.txt, "r");

source = fopen("CopyFile.txt", "r");

source = fopen("CopyFile.txt", "ab");

No change needed, program will give the correct output.

Question Number 96

#include < stdio.h>

int main()
{

    status = remove("Input.txt");

    if (status == 0)
        printf("File has been deleted successfully\n");
    else
    {
        printf("Unable to delete the file\n");
        perror("Error");
    }
    return 0;
}

int status;

FILE* status;

float status;

No change needed, program will give the correct output.

Question Number 97

#include < stdlib.h>

int main()
{
    char ch;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

int *source, *target;

char *source, *target;

No change needed, program will give the correct output.

Question Number 98

C preprocessor is conceptually the first step during compilation.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 99

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) % gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

gcd = a;

lcm = (x*y) % gcd;

No change needed, program will give the correct output.

Question Number 100

The following program is used to display the student details using structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10];
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

student{

struct student stud[10];

stud[i].studId = i + 1;

No change needed, program will give the correct output.

Question Number 101

Give the output of the following code snippet :

void main()
{
    1 <  2 ? return 1 : return 2;
}

Compilation error.

Question Number 102

Which preprocessor operator allows to concatenate actual arguments during macro expansion?

Question Number 103

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    count++;
    return count;
}

while (s[count] != 1)

while (s[count] != count +1)

while (s[count] != '\0')

No change needed, program will give the correct output.

Question Number 104

Give the use of the -(minus) sign in the prinft() format control string :

Left-justify the output within the specified field.

Include a negative sign to the value.

To convert positive to negative values

None of the above.

Question Number 105

Give the output of the following code snippet :

extern int x;
int x=20;
void main()
{
    {
        int x=30;
        x+=10;
        printf("%d ",x);
    }
    printf("%d",x);
}

30 30

40 20

30 20

40 30

Question Number 106

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {

                temp = arry[d];
                arry[d] = arry[d + 1];
            }
        }
    }
}

temp = arry[d];

arry[d] = arry[d + 1];

arry[d + 1] = temp;

No change needed, program will give the correct output.

Question Number 107

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j == num1 && k == num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

for (i = 0; i < num1 + num2;)

if (j == num1 && k == num2)

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 108

What type of inputs are accepted by mathematical functions?

short

int

float

double

Question Number 109

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    while (b != 0)
    {
        temp = b;

    }

    b = a % b;
    a = temp;
    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

b = a % b; a = temp;

gcd = a; lcm = (x*y) / gcd;

temp = b;

No change needed, program will give the correct output.

Question Number 110

Give the output of the following code snippet :

void main()
{
    long int x=258L;
    int y=10;
    long int z;
    z=x % y;

    printf("%d",z);
}

Compilation error

Question Number 111

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        sub[count] = str[position];
        length--;
    }
    sub[count] = '\0';

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

sub[count] = str[position]; length--;

printf("Input a string : \n"); scanf("%s",str);

No change needed, program will give the correct output.

Question Number 112

Give the output of the following code snippet :

#define Cprog
int main()
{
    int a = 2;
#ifdef Cprog
    a = 1;
    printf("%d", Cprog);

}

Compiler error

Question Number 113

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    if ((ch = fgetc(fs1)) != EOF)
        fputc(fs2, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

if ((ch = fgetc(fs1)) != EOF) fputc(fs2, ft);

if (ft == NULL) { perror("Error "); exit(EXIT_FAILURE); }

while ((ch = fgetc(fs2)) != EOF) fputc(ch, ft);

No change needed, program will give the correct output.

Question Number 114

Which type of files can’t be opened using fopen()?

.txt

.bin

None of the above.

Question Number 115

Give the output of the following code snippet :

void main()
{
    int x=3.105,y=6.6678;
    double z=ceil((double)x)/floor((double)y);
    printf("%.2f",z);
}

0.00

0.50

0.25

Question Number 116

The following program is used to sort an array of structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    printf("Enter student ID: ");
    scanf("%d", &stud[i].studId);
    printf("Enter name: ");
    scanf("%s", stud[i].name);
    printf("Enter marks: ");
    scanf("%d", &stud[i].marks);
    printf("\n");

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

for (i = 0; i< num; ++i)

for (i = 0; i< stud; ++i)

for (i = 0; i< student; ++i)

No change needed, program will give the correct output.

Question Number 117

Which of the following operators is used to obtain the complement of an integer value?

None of the above.

Question Number 118

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[j] = arry2[k];
                k++;
                i++;
            }
        }
    }
}

result[j] = arry2[k]; k++;

result[i] = arry2[k]; k++;

if (j < num1 && k < num2)

No change needed, program will give the correct output.

Question Number 119

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1; value1 = value2; value2 = temp;

temp = value2; value1 = value2; value1 + value2 = temp;

temp = value1; value1 = value2 - 1; value2 = temp;

No change needed, program will give the correct output.

Question Number 120

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fclose("File1.txt", "r");
    fs2 = fclose("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fclose("File1.txt", "r"); fs2 = fclose("File2.txt", "r");

while ((ch = fgetc(fs2)) != EOF) fputc(ch, ft);

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

No change needed, program will give the correct output.

Question Number 121

Give the output of the following code snippet :

void fun();
int main()
{
#define test(x, y) x / y + x
    fun();
}
void fun()
{
    printf("%d\n", test(-3, 3));
}

-8

-4

Compiler error

Question Number 122

The preprocessor provides the ability for which of the following options?

The inclusion of header files

The inclusion of macro expansions

Conditional compilation.

All of the above

Question Number 123

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y;

    gcd = a;
    lcm = (x*y) / gcd;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }


    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

b = a % b; a = temp;

gcd = a; lcm = (x*y) / gcd;

temp = b;

No change needed, program will give the correct output.

Question Number 124

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    while (str1[count] != '\0')
    {
        count++;
    }

    str1[count] = '\0';
}

str1[count] = '\0';

str1[count] = str2[d]; d++;

while (str1[count] != '\0') { count++; }

No change needed, program will give the correct output.

Question Number 125

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        if (arry[d] > arry[d + 1])
        {

            temp = arry[d];
            arry[d] = arry[d + 1];
            arry[d + 1] = temp;
        }
    }
}

for (c = 10; c < (n * 1); c--)

for (d = 0; d < n - c - 1; d++)

if (arry[d] > arry[d + 1])

No change needed, program will give the correct output.

Question Number 126

int str_compare(char[], char[]);

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        continue;
}

else continue;

if (a[count] == '\0' && b[count] == '\0') return 0;

if (a[count] == '\0' || b[count] == '\0') break;

No change needed, program will give the correct output.

Question Number 127

Give the output of the following code snippet :

void main()
{
    int x=10;
    int i=0;
    int n2=printf("%d\n",x);
    for(i=0; i>n2; i++)
    {
        printf("Hello");
    }
}

0
HelloHello

10
HelloHelloHello

Question Number 128

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

while ((ch = fgetc(source)) == 0)

while ((ch = fgetc(source)) != 1)

while ((ch = fgetc(source)) != EOF)

No change needed, program will give the correct output.

Question Number 129

The following program is used to add two complex numbers by passing structure to a function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

structure complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

structure complex

temp = Add(n1, n2);

struct complex temp;

No change needed, program will give the correct output.

Question Number 130

Which of the following are format specifiers in C?

Both 1 and 2

Question Number 131

Give the output of the following code snippet :

#define var 20);
int main()
{
    printf("%d\n", var
}

Compiler error

No output

None of the above

Question Number 132

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(str1, str2);

strcpy(str1);

strcpy(str2, str1);

No change needed, program will give the correct output.

Question Number 133

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

for (i = 0; i < num1 + num2;)

if (j < num1 && k < num2)

else if (j == num1)

No change needed, program will give the correct output.

Question Number 134

Give the output of the following code snippet :


void main()
{
    int k = fabs(-87);
    printf("%d\n", k);
}

-87

None of the above.

Question Number 135

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

scanf("%d", str);

scanf("%s", str);

scanf("%c", str);

No change needed, program will give the correct output.

Question Number 136

#include < stdlib.h>

int main()
{
    int *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fopen("File1.txt", "r");

fs2 = fopen("File2.txt", "r");

int *fs1, *fs2, *ft;

No change needed, program will give the correct output.

Question Number 137

#include< stdio.h>
int main()
{
    int array[100], position, count, n;

    printf("Enter number of elements in array : \n");
    scanf("%d", &n);

    printf("Enter %d elements : \n", n);

    for (count = 0; count <  n; count++)
        scanf("%d", &array[count]);

    printf("Enter the location where you wish to delete element : \n");
    scanf("%d", &position);

    if (position >= n + 1)
        printf("Deletion not possible.\n");
    else
    {
        for (count = position - 1; count <  n - 1; count++)
            printf("Resultant array : ");

        for (count = 0; count <  n - 1; count++)
            printf("%d\n", array[count]);
    }

    return 0;
}

array[count++] = array[count];

array[count -1] = array[count + 1];

array[count] = array[count + 1];

No change needed, program will give the correct output.

Question Number 138

int main()
{
    char str[100], sub[100];
    int position, length, count = 0;

    printf("Input a string  : \n");
    scanf("%s",str);
    sub[count] = '\0';

    printf("Enter the position and length of substring\n");
    scanf("%d%d", &position, &length);

    while (count <  length)
    {
        sub[count] = str[position + count - 1];
        count++;
    }

    printf("Required substring is %s\n", sub);

    return 0;
}

sub[count] = '\0';

scanf("%s",str);

sub[count] = str[position + count - 1];

No change needed, program will give the correct output.

Question Number 139

Give the output of the following code snippet :

int main()
{
    int a = 1, b = 1, d = 1;
    printf("%d, %d, %d", ++a + ++a, a++ + ++b, ++d + d++ );
}

7 , 2 , 3

6 , 2, 4

8, 2, 3

8, 3 ,4

Question Number 140

Give the output of the following code :

int main()
{
    int a = 10, b = 5, c = 5,d;
    d = b + c == a;
    printf("%d", d);
}

Compiler error

Question Number 141

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

str1[count] = str2[d];

while (str1[count] != '\0')

while (str2[d] != '\0')

No change needed, program will give the correct output.

Question Number 142

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

stud[i] = stud[j]; stud[j] = temp;

stud = stud[j]; stud = temp;

stud[j - 1] = stud[j]; stud[j + 1] = temp;

No change needed, program will give the correct output.

Question Number 143

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1, num2, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    num1 = 0;
    num2 = 0;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

result = num1 / num2

num2 = 0;

while (count< n)

No change needed, program will give the correct output.

Question Number 144

What is the return type of the minprintf() function :

int

char

void

float

Question Number 145

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be added to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        printf("%d ", result);
    }
    return 0;
}

num2 = result; --count;

num1 = result; ++count;

num2 = result; ++count;

No change needed, program will give the correct output.

Question Number 146

Give the output of the following code snippet :

#define PRINT(int) printf("Val=%d ", int);

int main()
{
    int a=2, b=3;
    PRINT(a);
    PRINT(b);
    return 0;
}

Val=2, Val=3

Val=1,Val=2

Val=0,Val=0

Val=3, Val=2

Question Number 147

Give the output of the following code snippet :

int func(float y);
void main()
{
    int b=func(10.5);
    printf("%d",b);
}
int func(float x)
{
    float a=200.25;
    return (a);
}

200.00

200.25

200

Compilation error

Question Number 148

What is the value obtained when the sizeof operator is applied to a char?

Question Number 149

What are the restrictions places on the names of variables and constants in C?

Should contain only letters and digits.

Keywords such as if, else, for etc. should not be used as variable names.

Underscore is the only special character allowed in the variable name.

All of the above.

Question Number 150

Give the output of the following code :


#define Message "Hello World"

int main()
{

    printf("%d\n",Message);
    return 0;
}

Hello World

Compiler error

No output

Garbage value

Question Number 151

While including a header file, if the file name is specified between quotes, then where is the file searched?

File is searched for only in the current working directory.

File is searched for in the current directory and then the parent directories present in the path.

Either 1 or 2

None of the above.

Question Number 152

Which of the following type specifiers are used to denote a floating point value in the scanf() function?

All of the above.

Question Number 153

Which of the following conversion specifiers is used to display a pointer value (memory address) in an implementation defined manner.

Question Number 154

Which of the following are valid #define statements in C?

#define CUBE(B) (B*B*B);

#define CUBE(b) (B*B*B)

#define CUBE(B)(B*B*B)

#define CUBE(B) {B*B*B}

Question Number 155


int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

int string_length(char[]);

void string_length(char[]);

int string_length();

No change needed, program will give the correct output.

Question Number 156

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

reverse[d] = str[count];

reverse[count + 1] = str[count];

reverse[count] = str[d + 1];

No change needed, program will give the correct output.

Question Number 157

The following program is used to find length of a string without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    while (s[count] != '\0')
        count++;

    return count;
}

length = string_length(str);

while (s[count] != '\0')

string_length(char[]);

No change needed, program will give the correct output.

Question Number 158

Give the output of the following code snippet :

void main()
{
    int b = 5 - 4 + 2 * 5;
    printf("%d", b);
}

-5

Question Number 159

Give the output of the following code :

int main()
{
    const int i=0;
    printf("%d\n", i++);
    return 0;
}

No output

Compiler error

Question Number 160

The following program is used to generate the fibonacci series. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?



#include < stdio.h>

int main()
{
    int count, n, num1, num2, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

count = 0; num1 = 0; num2 = 0;

count = 2; num1 = 0; num2 = 0;

count = 2; num1 = 0; num2 = 1;

No change needed, program will give the correct output.

Question Number 161

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        for (count = 0; count < = n; ++count)
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

if (n> 0)

fact = fact * count;

for (count = 0; count < = n; ++count)

No change needed, program will give the correct output.

Question Number 162

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == fs1)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

if (ft == fs1)

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF) fputc(ch, ft);

No change needed, program will give the correct output.

Question Number 163

Which is true about function tolower in C?

The function tolower is defined in ctype.h

Converts an upper case letter to lower case.

Returns the rest of the characters untouched.

All of the above.

Question Number 164


int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        count++;
    }
    d[count] = '\0';
}

copy_str(char[], char[]);

void copy_str(char[], char[]);

void copy_str(char[]);

No change needed, program will give the correct output.

Question Number 165

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    ft = fopen("Final.txt", "w");

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fopen("File1.txt", "r"); fs2 = fopen("File2.txt", "r");

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

ft = fopen("Final.txt", "w");

No change needed, program will give the correct output.

Question Number 166

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    if (num == 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

if (num == 0)

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 167

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    if (s[count] != '\0')
        count++;

    return count;
}

if (s[count] != '\0')

length = string_length(str);

scanf("%s", str);

No change needed, program will give the correct output.

Question Number 168

#include < stdio.h>

int main()
{
    int a, b, x, y, temp, gcd, lcm;

    printf("Enter two values : \n");
    scanf("%d%d", &x, &y);

    a = x;
    b = y % 10;

    while (b != 0)
    {
        temp = b;
        b = a % b;
        a = temp;
    }

    gcd = a;
    lcm = (x*y) / gcd;

    printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
    printf("Least common multiple of %d and %d = %d\n", x, y, lcm);

    return 0;
}

a = temp;

a = x;

b = y % 10;

No change needed, program will give the correct output.

Question Number 169

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fileopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

source = fileopen("CopyFile.txt", "r");

if (source == NULL)

No change needed, program will give the correct output.

Question Number 170

The following program is used to find the maximum value in an array. Which of the following statement(s) given in the choices should be reordered to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (count = 1; count <  size; count++)
    {
        if (array[count] > maximum)
        {
            location = count + 1;
        }
        maximum = array[count];
    }


    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

if (array[count] > maximum)

maximum = array[0];

maximum = array[count];

No change needed, program will give the correct output.

Question Number 171

Which of the following statements are true about macros in C?

They are case sensitive.

Substitution of macros do not take place within quoted strings.

Macros cannot be defined with arguments.

Both 1 and 2

Question Number 172

Which of the following data types fall under the floating types classification in C?

float

char

long int

All of the above

Question Number 173

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

for (count = strlength - 1, d = 0; count >= 0; count--, d++) reverse[d] = str[count];

for (count = strlength - 1, d = strlength; count >= 0; count++, d++) reverse[d] = str[count];

for (count = 1, d = 0; count != 0; count--, d++) reverse[count] = str[d];

No change needed, program will give the correct output.

Question Number 174

Give the output of the following code snippet :

void func(int a)
{
    a=200;
    printf("%d",a);
}
void main()
{
    func(10);
}

200

No output

Compilation error

Question Number 175



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

result = num1 + num2;

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 176

Give the output of the following code snippet :


#define max 10

int main()
{

    int i;

    i=max;

    printf("%d",i);

    return 0;
}

No output

Compilation error.

Question Number 177

Give the output of the following code snippet :


int main()
{
    int y=128;
    const int x=y;
    printf("%d\n", x);
    return 0;
}

128

Compiler error

Garbage value.

Question Number 178

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fgets("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

source = fgets("CopyFile.txt", "r");

if (source == NULL)

No change needed, program will give the correct output.

Question Number 179

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = 0, d = strlength; count >= 0; count++, d++)
        reverse[d] = str[count];

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

strlength = strlen(str);

for (count = 0, d = strlength; count >= 0; count++, d++)

reverse[d] = str[count];

No change needed, program will give the correct output.

Question Number 180

The following program is used to add 'n' numbers. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int num, sum = 1, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

    printf("Enter %d integers\n", num);

    for (count = 1; count < = num; count++)
    {
        scanf("%d", &value);
        sum = sum / value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

sum = sum / value;

sum = 1;

sum = value;

No change needed, program will give the correct output.

Question Number 181

Give the output of the following code snippet :

int x=10;
void main()
{
    int x=30;
    {
        int x=20;
        x+=10;
        printf("%d ",x);
    }
    x=x+10;
    printf("%d",x);
}

20 40

20 30

30 40

30 20

Question Number 182

The following program is used to reverse a string. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < string.h>

int main()
{
    char str[100], reverse[100];
    int strlength, count, d;

    printf("Input a string\n");
    scanf("%s",str);
    strlength = strlen(str);

    for (count = strlength - 1, d = 0; count >= 0; count--, d++)
        reverse[count + 1] = str[d + 1];

    reverse[d] = '\0';
    printf("%s\n", reverse);
    return 0;
}

reverse[d] = '\0';

for (count = strlength - 1, d = 0; count >= 0; count--, d++)

reverse[count + 1] = str[d + 1];

No change needed, program will give the correct output.

Question Number 183

Give the output of the following code snippet :

#define join(p,q) p##q
int main()
{
    int join(a,b)=45;
    printf("%d",ab);
    return 0;
}

No output

Compiler error

Question Number 184

int string_length(char[]);

int main()
{
    char str[100];
    int length;

    printf("Input a string\n");
    scanf("%s", str);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

int string_length(char s[])
{
    int count = 0;

    return count;
}

while (s[count] != '\0') count++;

while (s[count] != 1) count--;

while (s != '\0') count++;

No change needed, program will give the correct output.

Question Number 185

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        count++;
    }
    d[count] = '\0';
}

d[count] = s[count-1];

d[count] = s[count+1];

d[count] = s[count];

No change needed, program will give the correct output.

Question Number 186

The following program is used to merge the contents of two files. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

fs1 = fopen("File1.txt", "r"); fs2 = fopen("File2.txt", "r");

fs1 = fileopen("File1.txt", "r"); fs2 = fileopen("File2.txt", "r");

fs1 = fopn("File1.txt", "r"); fs2 = fopn("File2.txt", "r");

No change needed, program will give the correct output.

Question Number 187

Give the output of the following code snippet :

# define max
void Test()
{
    printf("Hello");
}
void main()
{
    max;
    Test();
}

Hello

No output

Compiler error

Garbage value

Question Number 188



#include < stdio.h>

int main()
{
    int count, n, num1 = 0, num2 = 1, result = 0;
    printf("Enter number of terms: ");
    scanf("%d", &n);
    printf("Fibonacci Series:\n %d  %d  ", num1, num2);
    count = 2;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        count--;
        printf("%d ", result);
    }
    return 0;
}

num1 = num2;

num2 = result;

count--;

No change needed, program will give the correct output.

Question Number 189

A leading 0x on an integer constant is used to denote:

octal

hexadecimal

long

None of the above.

Question Number 190

#include < stdio.h>

int main()
{
    int n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        for (count = 1; count != n; ++count)
        {
            fact = fact * count;
        }
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

int fact = 1;

for (count = 1; count != n; ++count)

fact = fact * count;

No change needed, program will give the correct output.

Question Number 191

Give the output of the following code snippet :

#define MIN(x,y) (x< =y?x:y);

void main()
{
    int a=9,b=10,d,e;
    d=MIN(a+10/2,--b*3);
    e=MIN(a+++ ++b,--d/3);
    printf("%d",e);
}

Compilation error

Question Number 192

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

else if (j == num1)

result[i] = arry1[j];

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 193

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i <  num; i++)
        for (int j = 0; j <  i; j++)
            if (stud.studId <  stud.studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

for (i = 0; i < num; i++)

for (int j = 0; j < i; j++)

if (stud.studId < stud.studId)

No change needed, program will give the correct output.

Question Number 194

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp, str1);

strcpy(str1, str2);

strcpy(str2, temp);

No change needed, program will give the correct output.

Question Number 195

The following program is used to sort an array of values using Bubble sort technique. Which of the following statement(s) given in the choices should be rearranged to make the program compile, link and run and give the desired output?

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {
                arry[d] = arry[d + 1];
                temp = arry[d];
                arry[d + 1] = temp;
            }
        }
    }
}

arry[d] = arry[d + 1];

for (d = 0; d < n - c - 1; d++)

if (arry[d] > arry[d + 1])

No change needed, program will give the correct output.

Question Number 196

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) == EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) == EOF)

fputc(ch, ft);

while ((ch = fgetc(fs2)) != EOF)

No change needed, program will give the correct output.

Question Number 197

Give the output of the following code :

int main()
{
    const c = -11;
    const int d = 34;
    printf("%d, %d\n", c, d);
    return 0;
}

-11 34

11 34

Garbage value

Compiler error.

Question Number 198

The following program is used to display the student details using structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{

    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

struct student[10];

struct student stud[10];

structure student stud[10];

No change needed, program will give the correct output.

Question Number 199

The following program is used to print the IP address of the system. Which of the following statement(s) given in the choices should be added to make the program compile, link and run and give the desired output?

#include < stdio.h>
#include < stdlib.h>


int main()
{
    return 0;
}

system("C:\\WINDOWS\\System32\\ip ");

system("C:\\WINDOWS\\System32\\IPConfig ");

system("C:\\WINDOWS\\System32\\ipconfig ");

No change needed, program will give the correct output.

Question Number 200

int str_compare();

int main()
{
    int flag;
    char str1[100], str2[100];

    printf("Input first string\n");
    scanf("%s", str1);

    printf("Input second string\n");
    scanf("%s", str2);

    flag = str_compare(str1, str2);

    if (flag == 0)
        printf("Entered strings are equal.\n");
    else
        printf("Entered strings are not equal.\n");

    return 0;

}

int str_compare(char a[], char b[])
{
    int count = 0;

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }

    if (a[count] == '\0' && b[count] == '\0')
        return 0;
    else
        return -1;
}

if (a[count] == '\0' && b[count] == '\0')

flag = str_compare(str1, str2);

int str_compare();

No change needed, program will give the correct output.

Question Number 201

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

stdlibrary.h

lib.h

stdlib.h

No change needed, program will give the correct output.

Question Number 202

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }


    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) != EOF) fputc(ft);

while ((ch = fgetc(ft)) != EOF) fputc(ch, ft);

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

No change needed, program will give the correct output.

Question Number 203

The following program is used to delete a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>

int main()
{
    int status;
    remove(status);
    if (status == 0)
        printf("File has been deleted successfully\n");
    else
    {
        printf("Unable to delete the file\n");
        perror("Error");
    }
    return 0;
}

int status;

remove(status);

if (status == 0)

No change needed, program will give the correct output.

Question Number 204

What is the default return-type of getchar()?

char

int

char

float

Question Number 205

Give the output of the following code snippet :

int x=10;
void main()
{
    x+=10;
    printf("%d",x);
}

Compilation error

Question Number 206

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

ft = fopen("Final.txt", "w");

ft = fgets("Final.txt", "w");

ft = fclose("Final.txt", "w");

No change needed, program will give the correct output.

Question Number 207

What is the escape sequence in C to add a backspace?

Question Number 208

The following program is used to concatenate two strings without using string function. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] == str2[count])
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

while (str1[count] != '\0')

while (str1[count] == str2[count])

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 209

void copy_str(char[], char[]);

int main()
{
    char str[100], dest[100];

    printf("Input a string\n");
    scanf("%s",str);

    copy_str(dest, str);

    printf("Source string:      %s\n", str);
    printf("Destination string: %s\n", dest);

    return 0;
}

void copy_str(char d[], char s[])
{
    int count = 0;

    while (s[count] != '\0')
    {
        d[count] = s[count];
    }
    d[count] = '\0';
}

count++;

count--;

s[count] = '\0';

No change needed, program will give the correct output.

Question Number 210

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[count] == '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

while (str1[count] != '\0')

while (str2[count] == '\0')

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 211

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;
    str1[count] = '\0';

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }


}

str1[count] = '\0';

str1[count] = str2[d]; d++;

while (str1[count] != '\0') { count++; }

No change needed, program will give the correct output.

Question Number 212

The following program is used to add two distances ( inch to feet ) using structures. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

struct Distance
{
    int feet;
    float inch;
};
Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

if (sum.inch>12.0)

Distance dist1, dist2, sum;

sum.inch = dist1.inch + dist2.inch

No change needed, program will give the correct output.

Question Number 213

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    if ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

if ((ch = fgetc(source)) != EOF)

fputc(ch, target);

fclose(target);

No change needed, program will give the correct output.

Question Number 214

Give the output of the following code snippet :

#define Cprog 10
int main()
{
    int a = 2;
#ifdef Cprog
    a = 1;
#endif
    printf("%d",Cprog);
}

Question Number 215

The following program is used to add two complex numbers by passing structure to a function. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp.real = n1.real + n2.real;
    return(temp);
}

temp = n1.imag + n2.imag;

temp.imag = n1.imag + n2.imag;

temp.imag = n1 + n2;

No change needed, program will give the correct output.

Question Number 216

The following program is used to add two distances ( inch to feet ) using structures. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

struct Distance
{
    int feet;
    float inch;
};
struct Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.inch = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

sum.feet = dist1.feet + dist2.feet;

sum = dist1.feet + dist2.feet;

sum.feet = dist1 + dist2;

No change needed, program will give the correct output.

Question Number 217

Give the output of the following code snippet :

int main()
{
#ifdef Hello
    printf("Hello\t");
#else
    printf("World\t");

}

Hello

World

No output

Compilation error

Question Number 218

void bubble_sort(int arry[], int n);
int main()
{
    int array[100], n, c;

    printf("Enter number of elements\n");
    scanf("%d", &n);

    printf("Enter %d integers\n", n);

    for (c = 0; c <  n; c++)
        scanf("%d", &array[c]);

    bubble_sort(array, n);

    printf("Sorted array in ascending order:\n");

    for (c = 0; c <  n; c++)
        printf("%d\n", array[c]);

    return 0;
}

void bubble_sort(int arry[], int n)
{
    int c, d, temp;

    for (c = 0; c <  (n - 1); c++)
    {
        for (d = 0; d <  n - c - 1; d++)
        {
            if (arry[d] > arry[d + 1])
            {

                temp = arry[d];
                arry[d] = arry[d + 1];
                arry[d + 1] = temp;
            }
        }
    }
}

for (c = 0; c < (n - 1); c++)

for (d = 0; d < n - c - 1; d++)

if (arry[d] > arry[d + 1])

No change needed, program will give the correct output.

Question Number 219

#include < stdio.h>

int main()
{
    int value;
    printf("Enter the value to be checked : ");
    scanf("%d", &value);
    if ((value * 2) == 0)
        printf("%d is even", value);
    else
        printf("%d is odd ", value);
    return 0;
}

printf("Enter the value to be checked : ");

scanf("%d", &value);

if ((value * 2) == 0)

No change needed, program will give the correct output.

Question Number 220

The following program is used to check if the given number is a prime number or not. Which of the following statement(s) given in the choices should be added to the program at some point to make the program compile, link and run and give the desired output?

#include< stdio.h>

int main()
{
    int value, i, flag = 0;
    printf("Enter a positive value: ");
    scanf("%d", &value);
    if (value % i == 0)
    {
        flag = 1;
        break;
    }

    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

for (i = 2; i < = value / 2; ++i)

for (i = 2; i < = value ; ++i)

for (i = 2; i < = value % 2; ++i)

No change needed, program will give the correct output.

Question Number 221

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }


    }
}

else { for (j = 0; i < num1 + num2; j++) { result[i] = arry1[j]; j++; i--; } }

else { for (; i < num1 + num2;) { result[i] = arry1[j]; j++; i++; } }

else { for ( i=0; i < num1 + num2; i++) { result[j-1] = arry1[j]; j--; i++; } }

No change needed, program will give the correct output.

Question Number 222

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {


            result[i] = arry1[j];
            j++;
        }
        else
        {
            result[i] = arry2[k];
            k++;
        }
        i++;
    }

    else if (j == num1)
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry2[k];
            k++;
            i++;
        }
    }

    else
    {
        for (; i <  num1 + num2;)
        {
            result[i] = arry1[j];
            j++;
            i++;
        }
    }
}
}

if (arry1[j] == arry2[k])

if (j < num1 && k < num2)

if (arry1[j] < arry2[k])

No change needed, program will give the correct output.

Question Number 223

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    maximum = array[0];

    for (count = 1; count <  size; count++)
    {
        if (array[count] > maximum)
        {
            maximum = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

for (count = 0; count > maximum; count++) scanf("\n%d", &array[count]);

for (count = 0; count < size; count++) scanf("\n%d", &array[count]);

for (count = 1; count > size; count++) scanf("\n%d", &array[count]);

No change needed, program will give the correct output.

Question Number 224

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

scanf("%d", &stud[i].marks);

struct student stud;

struct student

No change needed, program will give the correct output.

Question Number 225

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(int,int);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

void str_cat(char[], char[]);

str1[count] = str2[d];

str_cat(int,int);

No change needed, program will give the correct output.

Question Number 226

The following program is used to find the maximum value in an array. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];

    for (size = 1; count <  size; size ++)
    {
        if (array[count] > maximum)
        {
            maximum = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

maximum = array[count];

location = count + 1;

for (size = 1; count < size; size ++)

No change needed, program will give the correct output.

Question Number 227

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100], temp[50];

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

strcpy(temp);

strcpy(str1, str2);

strcpy(str2, temp);

No change needed, program will give the correct output.

Question Number 228

void MergeArrays ();

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry2[k];
                k++;
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

void MergeArrays ();

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])

MergeArrays(arry1, num1, arry2, num2, result);

No change needed, program will give the correct output.

Question Number 229

Give the output of the following code snippet :

void main()
{
    int b = 5 + 7 * 4 - 9 * (3-2);
    printf("%d", b);
}

Question Number 230

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

int main()
{
    char str1[100], str2[100];
    char temp;

    printf("Enter the str1 string\n");
    scanf("%s", str1);

    printf("Enter the str2 string\n");
    scanf("%s", str2);

    printf("\nBefore Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n\n", str2);

    strcpy(temp, str1);
    strcpy(str1, str2);
    strcpy(str2, temp);

    printf("After Swapping\n");
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);

    return 0;
}

char temp;

strcpy(temp, str1);

strcpy(str1, str2);

No change needed, program will give the correct output.

Question Number 231

When does the scanf() function stop execution?

When the format string is exhausted.

When input fails to match control specification.

Either 1 or 2

None of the above

Question Number 232

void MergeArrays (int[], int, int[], int, int[]);

int main()
{
    int arry1[100], arry2[100], num1, num2, c, result[200];

    printf("Input number of elements in first array\n");
    scanf("%d", &num1);

    printf("Input %d integers\n", num1);
    for (c = 0; c <  num1; c++)
    {
        scanf("%d", &arry1[c]);
    }

    printf("Input number of elements in second array\n");
    scanf("%d", &num2);

    printf("Input %d integers\n", num2);
    for (c = 0; c <  num2; c++)
    {
        scanf("%d", &arry2[c]);
    }

    MergeArrays(arry1, num1, arry2, num2, result);

    printf("Result array:\n");

    for (c = 0; c <  num1 + num2; c++)
    {
        printf("%d\n", result[c]);
    }
    return 0;
}

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])
{
    int i, j, k;
    j = k = 0;

    for (i = 0; i <  num1 + num2;)
    {
        if (j <  num1 && k <  num2)
        {

            if (arry1[j] <  arry2[k])
            {
                result[i] = arry1[j];
                j++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

        else if (j == num1)
        {
            for (; i <  num1 + num2;)
            {
                i++;
            }
        }

        else
        {
            for (; i <  num1 + num2;)
            {
                result[i] = arry1[j];
                j++;
                i++;
            }
        }
    }
}

result[i] = arry2[k]; k -- ;

result[i] = arry2[k]; k++;

result[k + 1] = arry2[k]; k++;

No change needed, program will give the correct output.

Question Number 233

#include< stdio.h>

int main()
{
    int value, i, flag = 0;
    printf("Enter a positive value: ");
    scanf("%d", &value);
    for (i = 2; i < = value / 2; ++i)
    {

        flag = 1;
        break;

    }
    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

if (value / i == 0)

if (value % i == 1)

if (value % i == 0)

No change needed, program will give the correct output.

Question Number 234

Give the importance of header files in C:

To provide information to the compiler about the library functions used in the program.

Contains the declarations of the functions used.

Both 1 and 2

None of the above.

Question Number 235

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

if (source != NULL) { printf("Press any key to exit...\n"); exit(EXIT_FAILURE); }

if (source == 1) { printf("Press any key to exit...\n"); exit(EXIT_FAILURE); }

if (source == NULL) { printf("Press any key to exit...\n"); exit(EXIT_FAILURE); }

No change needed, program will give the correct output.

Question Number 236

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fputc(ch, ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

if (fs1 == NULL || fs2 == NULL)

if (fs1 == 0 || fs2 == 0)

if (fs1 == fs2)

No change needed, program will give the correct output.

Question Number 237

#include < stdlib.h>

int main()
{
    FILE *fs1, *fs2, *ft;
    char ch;

    fs1 = fopen("File1.txt", "r");
    fs2 = fopen("File2.txt", "r");

    if (fs1 == NULL || fs2 == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    ft = fopen("Final.txt", "w");

    if (ft == NULL)
    {
        perror("Error ");
        exit(EXIT_FAILURE);
    }

    while ((ch = fgetc(fs1)) != EOF)
        fputc(ch, ft);

    while ((ch = fgetc(fs2)) != EOF)
        fclose( ft);

    printf("Two files have been merged successfully");

    fclose(fs1);
    fclose(fs2);
    fclose(ft);

    return 0;
}

while ((ch = fgetc(fs1)) != EOF) fputc(ch, ft);

fclose(fs1); fclose(fs2);

while ((ch = fgetc(fs2)) != EOF) fclose( ft);

No change needed, program will give the correct output.

Question Number 238

The following program is used to copy a file. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdlib.h>

int main()
{
    char ch;
    FILE *source, *target;
    source = fopen("CopyFile.txt", "r");

    if (source == NULL)
    {
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    target = fopen("Destination.txt", "w");

    if (target == NULL)
    {
        fclose(source);
        printf("Press any key to exit...\n");
        exit(EXIT_FAILURE);
    }

    while ((target = fgetc(source)) != EOF)
        fputc(ch, target);

    printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

while ((target = fgetc(source)) != EOF)

source = fopen("CopyFile.txt", "r");

fclose(source);

No change needed, program will give the correct output.

Question Number 239

Give the output of the following code snippet :

#define VAL 100);
int main()
{
    printf("%d\n", VAL
}

100

No output

Compilation error

Question Number 240

Give the output of the following code snippet :

int main()
{
    int i;
#if A
    printf("Test 1");
#elif B
    printf("Test 2");
    return 0;
}

Test 1

Test 2

No output

Compilation error

Question Number 241

Which of the following fall under the category of additive operators?

Both 1 and 2

Question Number 242

Which is true about function tolower in C ?

The function tolower is defined in string.h

Returns the ASCII value of the lower case character.

Converts an upper case letter to lower case.

All of the above.

Question Number 243

#include< stdio.h>

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10],temp;
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d", &num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        printf("Enter student ID: ");
        scanf("%d", &stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", &stud[i].marks);
        printf("\n");
    }

    for (i = 0; i > num; i++)
        for (int j = 0; j > i; j++)
            if (stud[i].studId <  stud[j].studId)
            {
                temp = stud[i];
                stud[i] = stud[j];
                stud[j] = temp;
            }

    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n",stud[i].studId);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

temp = stud[i]; stud[i] = stud[j]; stud[j] = temp;

for (i = 0; i > num; i++) for (int j = 0; j > i; j++)

if (stud[i].studId < stud[j].studId)

No change needed, program will give the correct output.

Question Number 244

struct complex
{
    float real;
    float imag;
};
struct complex Add(struct complex n1, struct complex n2);
int main()
{
    struct complex n1, n2, temp;
    printf("For first complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n1.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n1.imag);
    printf("For second complex number : \n");
    printf("Enter real part :\n");
    scanf("%f", &n2.real);
    printf("Enter imaginary part :\n");
    scanf("%f", &n2.imag);
    temp = Add(n1, n2);
    printf("Sum=%.1f+%.1fi", temp.real, temp.imag);
    return 0;
}
struct complex Add(struct complex n1, struct complex n2)
{
    struct complex temp;
    temp= n1.real + n2.real;
    temp.imag = n1.imag + n2.imag;
    return(temp);
}

struct complex temp;

temp= n1.real + n2.real;

temp.imag = n1.imag + n2.imag;

No change needed, program will give the correct output.

Question Number 245

Give the output of the following code snippet :

#if(10)
int main()
{
    printf("Hello World");
    return 0;
}
#else
int main()
{
    printf("Hello World :Round two");
}
#endif

Hello World

Hello World : Round two

No output

Compiler error

Question Number 246

struct Distance
{
    int feet;
    float inch;
};
struct Distance dist1, dist2, sum;

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;

    if (sum.inch>12.0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

struct Distance dist1, dist2, sum;

sum = dist1.feet + dist2.feet;

if (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 247

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat(str1, str2);

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }

    str1[count] = '\0';
}

while (str2[d] != '\0') { str1[count] = str2[d]; d++; count++; }

while (str2[d] != '\0') { str1[count] = str2[d]; d--; count--; }

while (str2[d] != str1[d]) { str1[count] = str2[d]; d++; count++; }

No change needed, program will give the correct output.

Question Number 248

struct student
{
    char name[50];
    int studId;
    int marks;
};

int main()
{
    struct student stud[10];
    int i, num;
    printf("Enter number of students : \n");
    scanf("%d",&num);
    printf("Enter information of students:\n");
    for (i = 0; i<  num; ++i)
    {
        stud[i].studId = i + 1;
        printf("\nStudent ID %d\n", stud[i].studId);
        printf("Enter name: ");
        scanf("%s", stud[i].name);
        printf("Enter marks: ");
        scanf("%d", stud[i].marks);
        printf("\n");
    }
    printf("Student Information :\n\n");
    for (i = 0; i<  num; ++i)
    {
        printf("\nStudent ID %d:\n", i + 1);
        printf("Name: %s", stud[i].name);
        printf("Marks: %d", stud[i].marks);
    }
    return 0;
}

scanf("%s", stud[i].name);

stud[i].studId = i + 1;

scanf("%d", stud[i].marks);

No change needed, program will give the correct output.

Question Number 249

#include< stdio.h>
int main()
{
    int array[100], maximum, size, count, location = 1;

    printf("\nEnter the number of elements in array : ");
    scanf("%d", &size);

    printf("Enter %d integers : ", size);

    for (count = 0; count <  size; count++)
        scanf("\n%d", &array[count]);

    maximum = array[0];
    {
        if (array[count] > maximum)
        {
            maximum = array[count];
            location = count + 1;
        }
    }

    printf("Maximum element is present at location %d and its value is %d.\n", location, maximum);
    return 0;
}

if (array[count] == maximum)

for (count = 0; count > size; count++)

for (count = 1; count < size; count++)

No change needed, program will give the correct output.

Question Number 250

Give the output of the following code snippet :

void main()
{
    int x=3,y=6;
    double z=sqrt((double)x);
    printf("%.2f",z);
}

1.73

Compilation error

Question Number 251

void str_cat(char[], char[]);

int main()
{
    char str1[100], str2[100];

    printf("Input a string : \n");
    scanf("%s", str1);

    printf("Input string to concatenate : \n");
    scanf("%s", str2);

    str_cat();

    printf("String obtained on concatenation : %s \n", str1);

    return 0;
}

void str_cat(char str1[], char str2[])
{
    int count = 0, d = 0;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

str_cat();

void str_cat(char[], char[]);

str1[count] = str2[d];

No change needed, program will give the correct output.

Question Number 252

The following program is used to swap two values. Which of the following statement(s) given in the choices should be corrected to make the program compile, link and run and give the desired output?

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1 + value2;
    value1 = value2;
    value2 = temp;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

temp = value1 + value2;

value1 = value2;

value2 = temp;

No change needed, program will give the correct output.

Question Number 253

#include < stdio.h>
int main()
{
    int value1, value2, temp;

    printf("\nEnter the value of value1 : ");
    scanf("%d", &value1);
    printf("\nEnter the value of value2 : ");
    scanf("%d", &value2);

    printf("Before Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    temp = value1;
    value1 = value2;

    printf("After Swapping\nvalue1 = %d\nvalue2 = %d\n", value1, value2);

    return 0;
}

value2 = temp;

value2 = temp /2;

value2 = value1 + value2;

No change needed, program will give the correct output.

Question Number 254

Give the output of the following code snippet :

void main()
{
    short int x;
    long int y;
    if(sizeof(x)==sizeof(y))
        printf("Hello");
    else
        printf("World");
}

Hello

World

No output

Compilation error

Question Number 255

#include < stdio.h>
int main()
{
    int value,num, reverse = 0;

    printf("Enter a number to reverse : ");
    scanf("%d", &value);

    num = value;

    while (num != 0)
    {
        reverse = reverse * 10;
        reverse = reverse + num % 10;
        num = num / 10;
    }

    if (value == num)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

if (value == num)

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.