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Question Number 1

A long definition for the replacement text in macros can be continued for several lines using which operator?

Question Number 2

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 == 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);

if (value == 0)

if (flag == 0)

No change needed, program will give the correct output.

Question Number 3

#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 = value;
            continue;
        }
    }
    if (flag == 0)
        printf("%d is a prime number", value);
    else
        printf("%d is not a prime number", value);
    return 0;
}

flag = value; continue;

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

if (flag == 0) printf("%d is a prime number", value);

No change needed, program will give the correct output.

Question Number 4

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);
    }

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

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

    while ((ch = fgetc(source)) != EOF)
        printf("File copied successfully.\n");

    fclose(source);
    fclose(target);

    return 0;
}

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

if (target == NULL)

fputc(ch, target);

No change needed, program will give the correct output.

Question Number 5

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\\whoAmI ");

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

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

No change needed, program will give the correct output.

Question Number 6

What are the two arguments taken by the putc() function in C?

Address of value, file pointer

Character to be written to file, file pointer.

Array of characters, address of array.

None of the above.

Question Number 7

A long constant in C is written with the terminal :

l(ell)

Either 1 or 2

None of the above.

Question Number 8

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 = 0, 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;

scanf("%d", &value);

for (count = 1; count < = num; count++)

No change needed, program will give the correct output.

Question Number 9

The following program is used to swap two strings. Which of the following statement(s) given in the choices should be removed 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(str1, str2);
    strcpy(str2, str1);
    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, str1);

No change needed, program will give the correct output.

Question Number 10

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 = strlength(str);

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

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

strlength = strlength(str);

for (count = strlength - 1, d = 0; count >= 0; count--, d++)

reverse[d] = str[count];

No change needed, program will give the correct output.

Question Number 11

Give the output of the following code snippet :

#define CUBE(X) X*X*X
void main()
{
    printf("%d  ", CUBE(3));
    printf("%d", CUBE(2+3));
}

27 125

27 225

18 17

27 17

Question Number 12

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()
{
    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)

FILE *fs1, *fs2, *ft;

fputc(ch, ft);

No change needed, program will give the correct output.

Question Number 13

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

    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;

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

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

No change needed, program will give the correct output.

Question Number 14

The conditional directives #if and #ifdef perform the same operations. State true or false.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 15

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

.txt

.bin

None of the above.

Question Number 16

Give the output of the following code snippet :

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

}

200

No output

Compilation error

Question Number 17

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;
};
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.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);
}

struct Distance dist1, dist2, sum;

sum.feet = dist1 -> feet + dist2 -> feet; sum.inch = dist1 -> inch + dist2 ->inch;

if (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 18

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);
    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 19

Give the output of the following code snippet :

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

Question Number 20

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 21

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.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;

    if (sum  <  0)
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

if (sum < 0)

sum.inch = dist1.inch + dist2.inch;

struct Distance dist1, dist2, sum;

No change needed, program will give the correct output.

Question Number 22

The #elif directive cannot be used after the conditional #else directive.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 23

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 = 0;
    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 = 0;

scanf("%d", &n);

fact = fact * count;

No change needed, program will give the correct output.

Question Number 24

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 (struct student 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 (struct student j = 0; j < i; j++)

if (stud[i].studId < stud[j].studId)

No change needed, program will give the correct output.

Question Number 25

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);
    }

    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;
}

target = fopen("w");

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

target = fopen(source, "w");

No change needed, program will give the correct output.

Question Number 26

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?

int string_length(char[]);

int main()
{
    char str;
    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;

length = string_length(str);

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

No change needed, program will give the correct output.

Question Number 27

Which of the following are types of C constants ?

Integer constants

Real or floating point constants.

Octal / Hexadecimal constants

All of the above.

Question Number 28

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 29

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(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[0];
        count++;
    }
    d[count] = '\0';
}

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

d[count] = '\0';

d[count] = s[0];

No change needed, program will give the correct output.

Question Number 30

Give the output of the following code snippet :

int main()
{
    int y = 1, x = 0;
    int l = (y++, x++) ? y : x;
    printf("%d\n", l);
}

No output

Question Number 31

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, 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,temp);

strcpy(str2, temp);

No change needed, program will give the correct output.

Question Number 32

Give the output of the following code snippet :

#define GT >
#define LT < 
#define AND &&
#define OR ||
void main()
{
    int x=100,y=200,z=300;
    if(((x + y GT z) == 0) AND ((x +y LT z) ==0))
        printf("%d",x+y+z);
    else
        printf("%d",z-y-x);
}

600

Compilation error

No output

Question Number 33

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

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

    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 34

The following program is used to generate the palindrome of a number. 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 value,num, reverse = 0;

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

    num = value;
    reverse = reverse * 10;
    reverse = reverse + num % 10;

    while (num != 0)
    {
        num = num / 10;
    }

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

    return 0;
}

reverse = reverse * 10; reverse = reverse + num % 10;

if (value == reverse) printf(" %d is a Palindrome",value);

while (num != 0) { num = num / 10; }

No change needed, program will give the correct output.

Question Number 35

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 36

Every source file that makes a reference to an input/output function must contain :

stdio.h

stdinpout.h

math.h

stdinop.h

Question Number 37

Give the output of the following code snippet :

void main()
{
    int x = 98;
    char y = x;
    printf("%c\n", y);
}

Garbage value

Compiler error

Question Number 38

Give the output of the following code snippet :

void main()
{
    float x=100.25,y=200.50;
    float z;
    z=x % y;

    printf("%f",z);
}

0.50

0.00

Compilation error

Question Number 39

#include< stdio.h>

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

int main()
{
    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;
}

student stud[10],temp;

if (stud[i].studId < stud[j].studId)

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 40

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?

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';
}

str_cat();

str_cat(str1, str2);

str1[count] = str2[d];

No change needed, program will give the correct output.

Question Number 41

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++)
        {
            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 42

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 43

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 44

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 == fs2)
    {
        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");

if (fs1 == fs2)

No change needed, program will give the correct output.

Question Number 45

A string constant in C is a sequence of zero or more characters within:

" "

' '

None of the above.

Question Number 46

What are the qualifiers that can be applied to a double data type in C?

short

long

unsigned

All of the above.

Question Number 47

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>

{
    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;
}

struct student

struct

structure student

No change needed, program will give the correct output.

Question Number 48

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 49

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("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;
}

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

printf("Input a string : \n"); scanf("%s",str[100]);

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

No change needed, program will give the correct output.

Question Number 50

What does the following segment of code do?

fprintf(fp, “Copy”);

It writes “Copy” into the file pointed by fp

It reads “Copy” from the file and prints on display.

It writes as well as reads “Copy” to and from the file and prints it.

None of the above.

Question Number 51

Which of the following data types do not fall under the integral types classification in C?

signed char

long double

unsigned char

Both 2 and 3

Question Number 52

The following program is used to execute a command in the OS. 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< stdlib.h>

int main()
{
    int files;

    printf("Executing command : 'DIR'\n");
    files = systems("dir");

    printf("Returned value is: %d.\n", files);
    return 0;
}

files = systems("dir");

printf("Returned value is: %d.\n", files);

#include< stdlib.h>

No change needed, program will give the correct output.

Question Number 53

The macro va_start initializes the argument pointer to point to ?

First unnamed argument

First named argument.

Second named argument.

List of unnamed arguments

Question Number 54

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);

    num = value;

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

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

    return 0;
}

reverse = reverse * 10;

reverse = reverse + num + 10;

reverse = reverse + num % 10;

No change needed, program will give the correct output.

Question Number 55

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

Variable name can contain letters ,digits and any special characters.

The first character should be a letter.

Keywords such as if, else, for etc. should can used as variable names.

All of the above.

Question Number 56

Give the output of the following code snippet :

void main()
{
    int n;
    scanf("%d",&n);
    printf("%d", n);
}
Assume input to n is 'c'

No output

Garbage value

Question Number 57

Give the output of the following code snippet :

int main()
{
    int x = 0, y = 2;
    if (!x && y)
        printf("True\n");
    else
        printf("False\n");
}

True

False

Compiler error

No output

Question Number 58

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 = 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)
    {
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

result = num1 + num2; num1 = num2;

num1 = num2; num2 = result;

num2 = num1 + result; num1 = num2;

No change needed, program will give the correct output.

Question Number 59

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 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;
    printf("Enter the value to be checked : ");
    scanf("%d", &value);
    printf("%d is even", value);
    else
        printf("%d is odd ", value);
    return 0;
}

scanf("%d", value);

if ((value % 2) == 0)

if ((value + 2) == 0)

No change needed, program will give the correct output.

Question Number 60

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;
        num1 = num2;
        num2 = result;
        printf("%d ", result);
    }
    ++count;
    return 0;
}

result = num1 + num2;

num1 = num2; num2 = result;

++count;

No change needed, program will give the correct output.

Question Number 61

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(str2, temp);

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

    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 62

#include < stdlib.h>

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

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

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

if (fs1 == NULL || fs2 == NULL)

No change needed, program will give the correct output.

Question Number 63

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);

    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(str1, str2);

void str_cat();

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

No change needed, program will give the correct output.

Question Number 64

Which of the following fall under the category of multiplicative operators?

All of the above

Question Number 65

Give the output of the following code snippet :

#define string(s) #s
int main()
{
    char str[15]= string(Hello World);
    printf("%s",str);
    return 0;
}

Hello World

Hello

No output

Compiler error

Question Number 66

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

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

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

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

count++;

No change needed, program will give the correct output.

Question Number 67

Give the output of the following code snippet :

#define VAR 10
int main()
{
#if VAR
    printf("%d",VAR);
#else
    printf("Hello World");
#endif
}

Hello world

No output

Compilation error

Question Number 68

Give the output of the following code snippet :

int main()
{
    const int a;
    a=10;
    printf("%d\n",a);
    return 0;
}

Compiler error

Question Number 69

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 < stringlength.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] = str[count];

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

#include < stdio.h>

#include < stringlength.h>

strlength = strlen(str);

No change needed, program will give the correct output.

Question Number 70

The following program is used to add 'n' 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 num, sum = 0, count, value;

    printf("Enter the number of integers to be added : \n");
    scanf("%d", &num);

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

    {
        scanf("%d", &value);
        sum = sum + value;
    }

    printf("Sum of entered integers = %d\n", sum);

    return 0;
}

for (count = 1; count < = value; count--)

for (count = 1; count < = num; count++)

for (count = 1; count < = num/2; count++)

No change needed, program will give the correct output.

Question Number 71

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 72

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 < lib.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;
}

#include < lib.h>

fclose(source);

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

No change needed, program will give the correct output.

Question Number 73

Which of the following operator has the highest precedence in the following?

()

sizeof

Question Number 74

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

if (count< n)

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 75

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


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

    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");

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 76

Name the library function used in C to display the output on the console to the user :

scanf ()

main()

printf()

None of the above .

Question Number 77

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 78

Give the output of the following code snippet :

int main()
{
    int a = 10, b = 5, c = 3;
    b += !a;
    c = !!a;
    printf("%d\t%d", b, c);
}

5 3

5 10

0 10

5 1

Question Number 79

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 80

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?


{
    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;
}

struct student

structure student

struct

No change needed, program will give the correct output.

Question Number 81

Give the output of the following code snippet :

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

200

Compilation error

Question Number 82

Give the output of the following code snippet :

#define CUBE(x) (x*x*x)
#define M 10
#define N M+1

int main()
{

    int volume =CUBE(3+2);

    printf("%d %d ",volume,N);

    return 0;
}

17 11

343 11

17 0

Compiler error

Question Number 83

Give the output of the following code snippet :

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

10 3

3 10

No output

Compilation error

Question Number 84

Give the output of the following code snippet :

#define FUNC(x,y,z) x##y##z
void main()
{
    int val=100;
    int val12=200;
    int val1val2=300;
    printf("%d",FUNC(val1,val,2));
}

100

200

300

Compilation error

Question Number 85

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 86

What is the use of the #include directive in C?

To define a set of constants.

To include the contents of a file during compilation.

Both 1 and 2

None of the above

Question Number 87

Which of the following are format specifiers in C?

All of the above.

Question Number 88

Give the output of the following code snippet :


{
    int a = 5, b = -7, c = 0, d;
    d = ++a && ++b || ++c;
    printf("%d  %d  %d  %d  ", a,b, c, d);
}

6 6 0 1

6 -5 0 1

6 -6 0 1

6 5 1 1

Question Number 89

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

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

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

printf("Press any key to exit...\n"); exit(EXIT_FAILURE);

No change needed, program will give the correct output.

Question Number 90

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?

struct complex
{
    float real;
    float imag;
};
struct complex Add(complex n1, 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);
}

temp.real = n1.real + n2.real;

temp.imag = n1.imag + n2.imag;

struct complex Add(complex n1, complex n2);

No change needed, program will give the correct output.

Question Number 91

Give the output of the following code snippet :

#define FUNC(x,y,z) x##y##z
void main()
{
    int val=100;
    int val12=200;
    int val123=300;
    printf("%d",FUNC(val1,2,3));
}

100

200

300

Compilation error

Question Number 92

Give the output of the following code snippet:

#define SQUARE(x) x*x

int main()
{
    float t=2,a;
    a =SQUARE(t);
    printf("Result = %f", a);
    return 0;
}

0.000000

4.000000

Question Number 93

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

All of the above.

Question Number 94



#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;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

num1 = num2/num1;

num1 = num1 + num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 95

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


int main()
{
    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 96

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';
}

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

d[count] = s;

d[count] = '\0';

No change needed, program will give the correct output.

Question Number 97

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 have a local scope.

Both 1 and 2.

Question Number 98

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 ((ch = fopen(source)) != EOF)
        fputc(ch, target);

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

    fclose(source);
    fclose(target);

    return 0;
}

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

fclose(source);

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

No change needed, program will give the correct output.

Question Number 99


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 100

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 = value;

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

No change needed, program will give the correct output.

Question Number 101

Give the output of the following code snippet :

void fun()
{
    printf("%d\n", max * 10);
}
int main()
{
#define max 10
    fun();
    return 0;
}

100

Compilation error

Question Number 102

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()
{
    FILE* 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;
}

FILE* status;

status = remove("Input.txt");

if (status == 0)

No change needed, program will give the correct output.

Question Number 103

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.feet = dist1.feet + dist2.feet;
    sum.inch = dist1.inch + dist2.inch;
    {
        sum.inch = sum.inch - 12.0;
        ++sum.feet;
    }
    printf("\nSum of distances=%d\'-%.1f\"", sum.feet, sum.inch);
}

if (sum > 12.0)

if (sum.inch>12.0)

while (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 104

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 105

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

It is a string constant.

It is defined in the header file < string.h>

The value of EOF is typically -1

All of the above.

Question Number 106

Give the output of the following code snippet :

#define CUBE(x)((x)*(x)*(x))
void fun()
{
    int x=2,y=1;
    int z=CUBE(++x + --y);
    printf("%d ",y);
}
void main()
{
    int a=3,b=10,c=5;
    int d;
    fun();
    b=CUBE(a+3)/b+c-a;
    printf("%d",b);
}

10 24

-1 18

-2 23

Compilation error

Question Number 107

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;
    int *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;
}

char ch;

int *source, *target;

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

No change needed, program will give the correct output.

Question Number 108

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 109

Give the output of the following code snippet :

void main()
{
    int x = 4, y, z;
    y = --x;
    z = x--;
    printf("%d %d %d", x,  y, z);
}

3 2 3

2 3 3

3 2 2

2 3 4

Question Number 110

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 111

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;

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

    return count;
}

while (s != '\0')

length = string_length(str);

scanf("%s", str);

No change needed, program will give the correct output.

Question Number 112

Give the output of the following code :

int main()
{
    int a=100, b=200, c;
    c = (a == 100 || b > 200);
    printf("%d\n", c);
    return 0;
}

100

200

Question Number 113

Give the output of the following code snippet :

#define fun(x, y) x / y + x
int main()
{

    printf("%d ", fun(-3, 3));
    return 0;
}

-4

Question Number 114

The following program is used to check the connectivity using a system command. 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;
}

ping("C:\\WINDOWS\\System32\\ping ");

Check_network("C:\\WINDOWS\\System32\\ping ");

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

No change needed, program will give the correct output.

Question Number 115

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


int main()
{
    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 116

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);
    }

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

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

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

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

    return 0;
}

fclose(source); fclose(target);

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

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

No change needed, program will give the correct output.

Question Number 117

Give the output of the following code snippet :

void main()
{
    int k = 8;
    int m = 7;
    int z = k <  m ? k = m : m++;
    printf("%d", z);
}

No output

Compiler error

Question Number 118

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[d] = str[count];

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

reverse[d] = strlen;

for (count = strlength - 1, d = 0; count >= 0; count--, d++)

reverse[d] = str[count];

No change needed, program will give the correct output.

Question Number 119

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++;
            }
        }
    }
}

for (; i < num1 + num2;)

else if (j != num1)

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

No change needed, program will give the correct output.

Question Number 120

What are the qualifiers that can be applied to an integer data type in C?

short

unsigned

signed

All of the above.

Question Number 121

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);

    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 122

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

It reads the characters from the standard input.

Stops execution when some input fails to match control specification

The return value of the function is an integer.

All of the above.

Question Number 123

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;
    }

    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;
}

gcd = a;

gcd = a / b;

gcd = a %b ;

No change needed, program will give the correct output.

Question Number 124

void 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;
}

void string_length(char[]);

length = string_length(str);

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

No change needed, program will give the correct output.

Question Number 125

The following program is used to reverse a string. 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>
#include < string.h>

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

    printf("Input a string\n");
    scanf("%s",str);
    reverse[d] = str[count];
    strlength = strlen(str);

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

scanf("%s",str);

reverse[d] = str[count];

strlength = strlen(str);

No change needed, program will give the correct output.

Question Number 126

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 % 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 127

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?

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.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.name);

scanf("%d", &stud[i].marks);

struct student stud[10];

No change needed, program will give the correct output.

Question Number 128

The ungetc() function can be used only with getc () : True or false.

Always true.

Always false.

Sometimes true and sometimes false.

No sufficient information to provide an accurate answer.

Question Number 129

How is the header file included in the C program?

#include "file.h"

#include < file.h>

Either 1 or 2

None of the above.

Question Number 130

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be removed 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);

    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++)
        {
            array[count] = array[count + 1];
            array[count + 1] = array[count -1];
        }


        printf("Resultant array : ");

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

    return 0;
}

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

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

for (count = position - 1; count < n - 1; count++){

No change needed, program will give the correct output.

Question Number 131

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 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;
}

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

int str_compare();

str_compare(char[], char[]);

No change needed, program will give the correct output.

Question Number 132

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 133

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

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

size = array[count];

location = count + 1;

maximum = array[size];

No change needed, program will give the correct output.

Question Number 134

Give the output of the following code snippet :

#define fun(m, n) " m ## n "
int main()
{
    printf("%s\n", fun(k, l));
}

k ## l

m ## n

Compiler error.

Question Number 135

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 136

Give the output of the following code snippet :

#define START void main() {

#define PRINT printf("Hello World");

#define END }

START

PRINT

END

Hello World

Hello

No output

Compiler error

Question Number 137



#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;

while (count == n)

No change needed, program will give the correct output.

Question Number 138

Give the output of the following code snippet :

#define PI 3.14
int main()
{
    float r=3,area;
    area = 3 * r * PI;
    printf("%f",area);
    return 0;
}

28.260000

Compiler error

Question Number 139

Give the output of the following code snippet :


#define square(x) x*x
int main()
{
    int x;
    x = 36/square(6);
    printf("%d", x);
    return 0;
}

No output

Question Number 140

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()
{
    int count = 0;

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

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

d[count] = s[count];

void copy_str()

No change needed, program will give the correct output.

Question Number 141

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 142

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 143

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);

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

    return 0;
}

strcpy(str1, temp);

strcpy(str2, temp);

strcpy(str2);

No change needed, program will give the correct output.

Question Number 144

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 145

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 146

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;
    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 147

structure 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.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);
}

structure Distance { int feet; float inch; };

struct Distance dist1, dist2, sum;

sum.inch = dist1.inch + dist2.inch

No change needed, program will give the correct output.

Question Number 148

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 + 1] = temp;
            }
        }
    }
}

temp = arry[d];

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

arry[d + 1] = temp;

No change needed, program will give the correct output.

Question Number 149

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++;
        count++;
    }

    str1[count] = '\0';
}

str1[count] = str2;

str1[count] = '\0';

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

No change needed, program will give the correct output.

Question Number 150

Name the library function used in C to get the input from the user through the console :

scanf ()

main()

printf()

None of the above .

Question Number 151

#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)

location = count + 1;

maximum = array[count];

No change needed, program will give the correct output.

Question Number 152

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

int main()
{
    struct 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;
}

struct stud[10];

scanf("%d", &stud[i].marks);

struct student

No change needed, program will give the correct output.

Question Number 153

Binary operators + and - have what priority ?

Same

+ has greater priority than -

- has greater priority than +

None of the above.

Question Number 154

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 < strlen.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] = str[count];

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

#include < stdio.h>

#include < strlen.h>

strlength = strlen(str);

No change needed, program will give the correct output.

Question Number 155

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

Should contain only letters and digits.

The first character should be a letter.

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

All of the above.

Question Number 156

#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 = fopen("Final.txt");

ft = fopen(fs1,fs2);

No change needed, program will give the correct output.

Question Number 157

cos(x) returns

sine of x where x is in radians

sine of x where x is in degree

cosine of x where x is in radians

cosine of x where x is in degree

Question Number 158

#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++)
            if (array[i+1] == array[count + 1])
                array[count] = array[count + 1];

        printf("Resultant array : ");

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

    return 0;
}

for (count = position - 1; count < n - 1; count++)

if (array[i+1] == array[count + 1])

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

No change needed, program will give the correct output.

Question Number 159

The #if conditional directive only evaluates :

String constant

Constant integer expressions

Both 1 and 3

Question Number 160

Give the output of the following code snippet :

#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 32

6 24

8 216

Compilation error

Question Number 161

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 162

#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[i] = 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[i] = stud[i];

stud[i] = stud[j];

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 163

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

    return 0;
}

num = value;

reverse = reverse % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 164

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?


{
    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

struct complex

struct

No change needed, program will give the correct output.

Question Number 165

Give the output of the following code snippet :

int a;
int main()
{

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

Garbage value

Compiler error.

Question Number 166



#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;
}

while (count < n)

--count;

num2 = result;

No change needed, program will give the correct output.

Question Number 167

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 == '\0' || b == '\0')
            break;
        count++;
    }

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

if (a == '\0' || b == '\0')

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

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

No change needed, program will give the correct output.

Question Number 168

Of the two logical operators && and ||, which one has greater precedence?

Both have equal precedence.

None of the above.

Question Number 169

The group of statements in a C program are enclosed within what type of brackets?

[]

()

{}

None of the above.

Question Number 170

Give the output of the following code snippet :


int func();
extern float a;
void main()
{
    int a=func();
    printf("%d",a);
}
float a=100.50;
int func()
{

    return a;
}

100

0.00

100.50

Question Number 171

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

All of the above.

Question Number 172

#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++)
        {
            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;
}

if (stud[i].studId < stud[j].studId)

if (stud[i].studId == stud[j].studId)

while (stud[i].studId < stud[j].studId)

No change needed, program will give the correct output.

Question Number 173



#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 = num1; --count;

No change needed, program will give the correct output.

Question Number 174

Give the output of the following code snippet :

int main()
{
    int i = -3;
    int k = i % 2;
    printf("%d\n", k);
}

-1

No output

Question Number 175

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 176

What is the return type of the printf() function in C?

int

char

float

None of the above.

Question Number 177

#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 178

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 179

The function to generate a sequence of pseudo-random integers is defined in which header file?

math.h

stdlib.h

ctype.h

stdio.h

Question Number 180

#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 181

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 182

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 183

#include< stdio.h>

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

int main()
{
    struct student stud[10];
    int 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;
}

struct student stud[10];

int temp;

stud[i] = stud[j];

No change needed, program will give the correct output.

Question Number 184

Give the output of the following code snippet :

void main()
{
    int k = 8;
    int m = 7;
    int z = k <  m ? k++ : m++;
    printf("%d", z);
}

Question Number 185

Which of the following are conditional directives in C?

#ifdef

#include

#define

All of the above

Question Number 186

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

Question Number 187


{
    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.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);
}

struct Distance

structure Distance

Distance

No change needed, program will give the correct output.

Question Number 188

#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);

    value1 = value2;
    value2 = temp;

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

    return 0;
}

temp = value1;

temp = value1 + value2;

temp = value2;

No change needed, program will give the correct output.

Question Number 189

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

int main()
{
    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;
}

struct student

scanf("%d", &stud[i].marks);

student stud[10];

No change needed, program will give the correct output.

Question Number 190

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];

    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';
}

count++;

d[count] = '\0';

copy_str(dest, str);

No change needed, program will give the correct output.

Question Number 191

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

    return 0;
}

num = value;

reverse = reverse * 10;

num = num + 10;

No change needed, program will give the correct output.

Question Number 192

Give the output of the following code snippet :

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

-5

Question Number 193

What is the purpose of sprintf?

It obtains the data into standard input stream.

It writes the formatted output into a string

It writes the formatted output data into a file

Both 1 and 3

Question Number 194

#include< stdio.h>

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

int main()
{
    struct student[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;
}

struct student[10],temp;

if (stud[i].studId < stud[j].studId)

stud[j] = temp;

No change needed, program will give the correct output.

Question Number 195

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 196

#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;
    temp = b;

    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;
}

a = x;

b = y;

temp = b;

No change needed, program will give the correct output.

Question Number 197

The following program is used to swap two strings. 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?

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

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

    return 0;
}

strcpy(temp, str1);

scanf("%s", str1);

No change needed, program will give the correct output.

Question Number 198

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

temp = arry[d + 1];

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

arry[d + 1] = temp;

No change needed, program will give the correct output.

Question Number 199

#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;
    }

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

    return 0;
}

num = num / 10;

num = num + 10;

num = num % 10;

No change needed, program will give the correct output.

Question Number 200

The C pre-processors are specified with which symbol?

" "

None of the above

Question Number 201

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 202

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;
    status = remove("Input.txt");
    while (status == -1)
        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");

while (status == -1)

No change needed, program will give the correct output.

Question Number 203

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 204

The following program is used to swap two strings. 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?

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(str1, 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;
}

scanf("%s", str1);

strcpy(str1, str2);

printf("Second string: %s\n", str2);

No change needed, program will give the correct output.

Question Number 205

Give the output of the following code snippet :

#define MAX(x,y) (x>=y?x:y);

void main()
{
    int a=3,b=10,d;
    d=MAX(a,b);
    printf("%d",d);
}

Compilation error

Question Number 206

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;

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

    str1[count] = '\0';
}

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

void str_cat();

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

No change needed, program will give the correct output.

Question Number 207

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 removed 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])
            {

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

temp = arry[d];

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

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

No change needed, program will give the correct output.

Question Number 208

Give the output of the following code snippet :

int main()
{
    int i = 10, j = 2;
    printf("%d ", printf("%d %d ",i,j));
}

10 2 5

10 2 2

10 2

Compilation error

Question Number 209

Which of the following are examples of derived data types?

structure

function

pointers

All of the above

Question Number 210

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

Variable name can contain letters ,digits and any special characters.

The first character should be a special character

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

All of the above.

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;

    while (str1[count] != '\0')
    {
        count++;
    }
    while (str2[d] != '\0')
    {
        count++;
    }
    str1[count] = str2[d];
    d++;
    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 212

#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;
        temp = 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;
}

gcd = a;

b = a % b;

lcm = (x*y) / gcd;

No change needed, program will give the correct output.

Question Number 213

Give the output of the following code snippet :

#define A 4-2

#define B 3-1

int main()
{

    int ratio=A/B;

    printf("%d ",ratio);

    return 0;
}

Question Number 214

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

    return 0;
}

reverse = reverse * 10;

reverse = reverse + num % 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 215

#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 = 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;
}

maximum = 0;

for (count = 1; count < size; count++)

if (array[count] > maximum)

No change needed, program will give the correct output.

Question Number 216

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 217

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 218

The syntax to print a % using printf statement can be done by.

"%"

Question Number 219

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 220

The following program is used to copy strings without using string function. Which of the following statement(s) given in the choices should be removed 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;

    while (s[count] != '\0')
    {
        d[count] = s[count];
        d[count] = d[count-1];
        count++;
    }
    d[count] = '\0';
}

d[count] = s[count];

d[count] = d[count-1];

count++;

No change needed, program will give the correct output.

Question Number 221

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);


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

    flag = str_compare(str1, str2);
    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') break;

flag = str_compare(str1, str2);

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

No change needed, program will give the correct output.

Question Number 222

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;

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

copy_str(dest, str);

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

d[count] = s[count];

No change needed, program will give the correct output.

Question Number 223

Which preprocessor operator allows to convert any argument in a macro function to a string?

Question Number 224

#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 225

#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 226



#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 227

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;
    value1 = value2 - 1;
    value2 = temp;

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

    return 0;
}

temp = value1;

value1 = value2 - 1;

value2 = temp;

No change needed, program will give the correct output.

Question Number 228

#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] = str[count];

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

for (count = 0, d = 0; count >= 0; count--, d++)

for (count = strlength - 1, d = 0; count >= 0; count--, d++)

for (count = 1, d = 0; count != 0; count++, d++)

No change needed, program will give the correct output.

Question Number 229

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[d] = str[count];

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

for (count = strlength - 1, d = 0; count == 0; count++, d++)

reverse[d] = str[count];

reverse[d] = '\0';

No change needed, program will give the correct output.

Question Number 230

Give the output of the following code snippet :

#define SQR(x)(x*x)

int main()
{
    int a, b=3;
    a = SQR(b+2);
    printf("%d\n", a);
    return 0;
}

Question Number 231



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] = str[count];

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

string.h

stringlen.h

stringlength.h

No change needed, program will give the correct output.

Question Number 232

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 233



#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 234

#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 235

#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");
    }
    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 (int j = 0; j < i; j++)

for (i = j; i < num/2; i++) for (int j = 0; j < i; j++)

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

No change needed, program will give the correct output.

Question Number 236

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

Question Number 237

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 ; 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 ; d++)

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

No change needed, program will give the correct output.

Question Number 238

Which of the following if not allowed in a constant expression?

Increment/decrement operators

Function calls

Assignment statements.

All of the above.

Question Number 239

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 240

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

copy_str(dest, str);

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

s[count] = '\0';

No change needed, program will give the correct output.

Question Number 241

Give the output of the following code snippet :

#define GT >
#define LT <
#define AND &&
#define OR ||
void main()
{
    int x=100,y=200,z=300;
    if(((x + y GT z) == 0) OR ((x +y LT z) ==0))
        printf("%d",x+y+z);
    else
        printf("%d",z-y-x);
}

600

Compilation error

No output

Question Number 242

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

Tests the error indicator for the given stream.

Returns non-zero value if end of file has occurred.

It is analogous to feof() function.

All of the above.

Question Number 243

The following program is used to display the student details using structures. 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?


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

printf("Enter name: "); scanf("%s", stud[i].name);

printf("Enter marks: "); scanf("%d", &stud[i].marks);

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

No change needed, program will give the correct output.

Question Number 244

Give the output of the following code snippet :

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

-8

-4

Compiler error

Question Number 245

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 246

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 247

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 248

struct Distance
{
    int feet;
    float inch;
} 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)

struct Distance { int feet; float inch; } dist1, dist2, sum;

sum.inch = dist1.inch + dist2.inch

No change needed, program will give the correct output.

Question Number 249

Give the output of the following code snippet :

#define Hello

int main()
{
#ifdef Hello
    printf("Hello\t");
#else
    printf("World\t");
#endif
}

Hello

World

No output

Compilation error

Question Number 250

struct complex
{
    float real;
    float imag;
};
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);
}

int Add(struct complex n1, struct complex n2);

struct complex Add(struct complex n1, struct complex n2);

void Add(struct complex n1, struct complex n2);

No change needed, program will give the correct output.

Question Number 251

#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 252

#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);

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

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

    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 253

#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<  stud; ++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;
}

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

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

for (int j = 0; j < i; j++)

No change needed, program will give the correct output.

Question Number 254

Give the output of the following code snippet :

void main()
{
    int x=3,y=6;
    double z=fmod((double)x,(double)y);
    printf("%.2f",z);
}

3.00

Compilation error

Question Number 255

#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;
}

struct student

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

temp = stud[i];

No change needed, program will give the correct output.