Knowledge check.

- Choose one best answer from given 4 choices for each questions.
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Question Number 1

Give the output of the following code snippet:

void main()
{
    int c;
    scanf ("%d",c);
    printf("Obtained value is %d", c);
}

Garbage value

Run time error

None of the above

Question Number 2

An unsigned constant in C is written with the terminal :

Either 1 or 2

None of the above.

Question Number 3

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

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

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

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

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

    str_cat(str1, str2);

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

    return 0;
}

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

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

    str1[count] = '\0';
}

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

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

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

No change needed, program will give the correct output.

Question Number 4

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

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

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

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

    str_cat(str1, str2);

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

    return 0;
}

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

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

    str1[count] = '\0';
}

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

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

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

No change needed, program will give the correct output.

Question Number 5

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

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

a = temp;

gcd = a % b;

lcm = (x*y) / gcd;

No change needed, program will give the correct output.

Question Number 6

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

#include< stdio.h>

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

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

Question Number 7

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 8

#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 9

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

float

long double

unsigned char

Both 2 and 3

Question Number 10

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;

    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 11

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

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

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

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

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

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

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

    return 0;
}

strcpy(str1, str2);

strcpy(str1);

strcpy(str2, str1);

No change needed, program will give the correct output.

Question Number 12

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 13

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 14

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

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

struct Distance dist1, dist2, sum;

sum = dist1.feet + dist2.feet;

if (sum.inch>12.0)

No change needed, program will give the correct output.

Question Number 15

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

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

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

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

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

    return 0;
}

while (count < length)

while (count == length)

while (count != length)

No change needed, program will give the correct output.

Question Number 16

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 17

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;
    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 18

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[k];
                k++;
            }
            else
            {
                result[i] = arry2[k];
                k++;
            }
            i++;
        }

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

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

result[i] = arry1[k]; k++;

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

result[i] = arry1[j]; j++;

No change needed, program will give the correct output.

Question Number 19

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

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

int main()
{
    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 20

What is the meant by ‘a’ in the following operation?

fp = fopen(“New.txt”, “a”);

Attach

Append

Apprehend

Add

Question Number 21

Which of the following is the general declaration of the minprintf() function?

int minprintf(char *fmt,....)

void minprintf(char *fmt,....)

void minprintf(char *fmt,char *fm2)

char minprintf(char *fmt,char *fm2);

Question Number 22

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 23

Give the output of the following code snippet :

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

}

Compiler error

Question Number 24

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 25

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

int

char

void

float

Question Number 26

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("\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);
}

printf("Enter inch: "); scanf("%f", &dist1.inch);

printf("Enter inch: "); scanf("%f", &dist1);

printf("Enter inch: "); scanf("%f", &dist1->inch);

No change needed, program will give the correct output.

Question Number 27

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()
{
    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 28

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

flag = flag/2;

flag = value ;

flag = 1;

No change needed, program will give the correct output.

Question Number 29

Give the output of the following code snippet :

int main()
{
    int x = 2;
    x = x < <  1;
    printf("%d\n", x);
}

No output

Compilation error.

Question Number 30

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()
{
    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 31

Give the output of the following code snippet :

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

200

No output

Compilation error

Question Number 32

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[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 33

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

Question Number 34

void MergeArrays ();

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

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

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

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

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

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

    printf("Result array:\n");

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

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

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

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

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

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

void MergeArrays ();

void MergeArrays (int arry1[], int num1, int arry2[], int num2, int result[])

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

No change needed, program will give the correct output.

Question Number 35

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 36

Give the output of the following code snippet :

int main()
{
    const int a = 10;

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

Compiler error

Question Number 37

The following program is used to add 'n' 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 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);


    for (count = 1; count < = num; count++)
    {
        sum = sum + value;
    }

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

    return 0;
}

scanf("%d", &num);

scanf("%d", &value);

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

No change needed, program will give the correct output.

Question Number 38

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

#include < stdlib.h>

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

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

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

    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;
}

exit(EXIT_FAILURE);

break;

continue;

No change needed, program will give the correct output.

Question Number 39

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

It is typically used to denote the end of a file

It is defined in the header file string.h

The value of EOF is typically 1

All of the above.

Question Number 40

Binary operators % and + have what priority ?

Same

% has greater precedence than +

+ has greater precedence than %

None of the above.

Question Number 41

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 42

Give the output of the following code snippet :

#define var 10

int main()
{
#if var
    printf("Hello");
#else
    printf("World");
#endif

    return 0;
}

Hello

World

No output

Compiler error

Question Number 43

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 44

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 % 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 45

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

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

    num = value;
    reverse = reverse * 10;

    while (num != 0)
    {
        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 46

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;

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

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 47

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

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

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

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

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

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

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

    return 0;
}

strcpy(temp, str1);

char str1[100], str2, temp;

scanf("%s", str2);

No change needed, program will give the correct output.

Question Number 48

#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)
            {

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

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

temp = stud[i];

temp = stud[j];

temp = stud;

No change needed, program will give the correct output.

Question Number 49

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

Question Number 50

#include< stdio.h>

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

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

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

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

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

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

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

No change needed, program will give the correct output.

Question Number 51

Give the output of the following code snippet :

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

0
HelloHello

1
HelloHelloHello

2
HelloHello

Compilation error

Question Number 52

Give the output of the following code snippet :

void main()
{

    printf("%d",printf("Hello World "));

}

Hello World

Hello World 10

Hello World 12

Compilation error

Question Number 53

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

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

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

    copy_str(str);

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

    return 0;
}

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

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

d[count] = s[count];

copy_str(str);

d[count] = '\0';

No change needed, program will give the correct output.

Question Number 54

Give the output of the following code snippet :

#define INFLOOP while(1)

int main()
{
    INFLOOP
    printf("Hello");
    return 0;
}

Hello

No output

Compiler error

Infinite loop

Question Number 55

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;
}

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

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

    return count;
}

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

void string_length(char s[])

return count;

No change needed, program will give the correct output.

Question Number 56



#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 57

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

Tests the end of file indicator for the given stream.

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

It is analogous to ferror() function.

All of the above.

Question Number 58

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);
}

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

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

sum.inch = sum.inch - 12.0;

No change needed, program will give the correct output.

Question Number 59

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 reordered to make the program compile, link and run and give the desired output?

int string_length(char[]);

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

return count;

length = string_length(str);

int string_length(char[]);

No change needed, program will give the correct output.

Question Number 60

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 61

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 62

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

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

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

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

result[i] = arry1[j];

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

No change needed, program will give the correct output.

Question Number 63

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

#include < stdlib.h>

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

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

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

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

if (source == NULL)

No change needed, program will give the correct output.

Question Number 64

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;
    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 65

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, temp);
    strcpy(str2, str1);

    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 66

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;

    {
        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;
}

while (b != 0)

if (b != 0)

while (b == 0)

No change needed, program will give the correct output.

Question Number 67

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

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

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

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

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

    str_cat(str1, str2);

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

    return 0;
}

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

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

    str1[count] = '\0';
}

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

while (str1[count] == str2[count])

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 68

#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;
        a = temp;
    }

    b = a % b;
    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;

gcd = a;

lcm = (x*y) / gcd;

No change needed, program will give the correct output.

Question Number 69

Give the output of the following code snippet :

int main()
{
    const int a = 10;
    printf("%d ",a);
    a=12;
    printf("%d\n",a);
    return 0;
}

10 12

10 0

0 12

Compiler error

Question Number 70

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

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

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

struct student stud;

struct student

No change needed, program will give the correct output.

Question Number 71

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 (str1[count] == str2[count])
    {
        str1[count] = str2[d];
        d++;
        count++;
    }

    str1[count] = '\0';
}

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

while (str1[count] == str2[count])

str1[count] = '\0';

No change needed, program will give the correct output.

Question Number 72

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 73

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

result = num1 + num2;

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 74

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

All of the above

Question Number 75

Give the output of the following code snippet :

#if -2+5-6/2
int main()
{
    printf("Hello");
    return 0;
}
#else
int main()
{
    printf("World");
    return 0;
}
#endif

Hello

World

No output

Compiler error

Question Number 76

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 + 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 77

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 78

The #if conditional directive only evaluates :

String constant

Constant integer expressions

Both 1 and 3

Question Number 79

Give the output of the following code snippet :

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

Compiler error

No output

None of the above

Question Number 80

#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;

while (num < = 0)

reverse = reverse * 10;

No change needed, program will give the correct output.

Question Number 81

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



#include < stdio.h>

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

result = num1 + num2;

num1 = num2; num2 = result;

while (count< n)

No change needed, program will give the correct output.

Question Number 82

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

Sets the seed for srand() function.

Helps to generate square root of a value.

Is defined in the header file stdlib.h

All of the above.

Question Number 83

What is a FILE in C?

One of the basic datatypes in c.

Pointer to the structure defined in stdio.h

It is a structure declaration in stdio.h

None of the above.

Question Number 84

#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);
    }

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

    fclose(source);
    fclose(target);

    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 85

What is the return type of rand() function?

short

int

long

double

Question Number 86

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(target,"r");

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

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

FILE *source, *target;

if (source == NULL)

source = fopen(target,"r");

No change needed, program will give the correct output.

Question Number 87

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];
                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 88

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;

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

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

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

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

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

No change needed, program will give the correct output.

Question Number 89

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

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

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

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

    flag = str_compare(str1, str2);

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

    return 0;

}

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

    while (a[count] == b[count])
    {
        if (a[count] == '\0' || b[count] == '\0')
            break;
        count++;
    }
    return -1;
}

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

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

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

No change needed, program will give the correct output.

Question Number 90

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

a = temp;

if (b != 0)

b = a % b;

No change needed, program will give the correct output.

Question Number 91

#include < stdio.h>

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

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

    a = x;
    b = y;

    while (b != 0)
    {
        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 92

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

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


int main()
{
    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 93

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 94

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(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 95

Give the output of the following code snippet :

void main()
{

    int x = 5 % 2 * 4 / 2;
    printf("%d", x);
}

No output

Question Number 96

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 = delete("Input.txt");

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

perror("Error");

status = delete("Input.txt");

if (status == 0)

No change needed, program will give the correct output.

Question Number 97

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

#include< stdio.h>

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

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

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

temp = stud[i];

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

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

No change needed, program will give the correct output.

Question Number 98



#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 99

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

It reads the characters from the standard input.

Stops execution when it exhausts the format string.

It does not return any value.

Both 1 and 2

Question Number 100

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 101

struct complex
{
    float real;
    float imag;
};
struct complex Add(int n1, int 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(int n1, int n2);

No change needed, program will give the correct output.

Question Number 102

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

All of the above.

Question Number 103

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 104

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 105

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);


    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 106

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

Should contain only letters and digits.

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

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

All of the above.

Question Number 107

Give the output of the following code snippet :

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

Compilation error.

Question Number 108

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 109

#include < stdlib.h>

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

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

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

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

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

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

No change needed, program will give the correct output.

Question Number 110

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

#include < stdlib.h>

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

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

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

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

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

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

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

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

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

    return 0;
}

while ((ch = fgetc(fs1)) == EOF)

fputc(ch, ft);

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

No change needed, program will give the correct output.

Question Number 111

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;

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

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

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

fclose(source);

No change needed, program will give the correct output.

Question Number 112

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

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

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

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

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

    maximum = array[0];

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


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

if (array[count] > maximum)

maximum = array[0];

maximum = array[count];

No change needed, program will give the correct output.

Question Number 113

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

temp = b;

b = a / b;

a = temp;

No change needed, program will give the correct output.

Question Number 114

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;

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

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

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

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

    return 0;
}

count = 0;

sub[count] = '\0';

while (count < length)

No change needed, program will give the correct output.

Question Number 115

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

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

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

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

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

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

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

    return 0;
}

strcpy(temp);

strcpy(str1, str2);

strcpy(str2, temp);

No change needed, program will give the correct output.

Question Number 116

#include < stdio.h>

int main()
{
    int value;
    printf("Enter the value to be checked : ");
    if ((value % 2) == 0)
        printf("%d is even", value);
    else
        printf("%d is odd ", value);
    return 0;
}

scanf("%d", value);

scanf("%d", &value);

if ((value / 2) == 0)

No change needed, program will give the correct output.

Question Number 117



#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 = 0;
    while (count< n)
    {
        result = num1 + num2;
        num1 = num2;
        num2 = result;
        ++count;
        printf("%d ", result);
    }
    return 0;
}

count = 0;

num1 = num2;

num2 = result;

No change needed, program will give the correct output.

Question Number 118

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

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

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

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

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

    return 0;
}

num = value;

reverse = reverse * 10;

reverse = reverse + num % 10;

No change needed, program will give the correct output.

Question Number 119

#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 120

Give the importance of header files in C:

To provide information to the compiler about the library functions used in the program.

Contains the declarations of the functions used.

Both 1 and 2

None of the above.

Question Number 121

Which of the following represents the function for scanf?

void scanf(char *format, …)

int scanf(char *format, …)

char scanf(int format, …)

char *scanf(char *format, …)

Question Number 122

Give the output of the following code :


void main()
{
    int x = 1, y = 0, z = 5;
    int a = x && y && z;

    printf("%d", a);
}

Garbage value

Question Number 123

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 124

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[count] == s[count+1])
        count++;

    return count;
}

length = string_length(str);

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

count++;

No change needed, program will give the correct output.

Question Number 125

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

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

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

No change needed, program will give the correct output.

Question Number 126

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 127

#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 128

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 129

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

temp = a+b;

temp = b;

a = b;

No change needed, program will give the correct output.

Question Number 130

#include < stdlib.h>

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

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

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

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

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

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

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

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

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

    return 0;
}

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

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

int *fs1, *fs2, *ft;

No change needed, program will give the correct output.

Question Number 131

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 132

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 133

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

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

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

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

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

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

    return 0;
}

sub[count] = '\0';

if (count == length)

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

No change needed, program will give the correct output.

Question Number 134

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

short

long

signed

All of the above.

Question Number 135

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

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

    flag = str_compare(str1, str2);

    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");

    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 136

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

Screen

Standard output

Depends on the compiler

None of the above.

Question Number 137

Which of the following is a valid way to define constants using #define in C?

#define square a*a

#define CONST 10

#define MESSAGE "Hello"

All of the above.

Question Number 138

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 == 1)
    {
        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;
}

fputc(ch, target);

fclose(target);

if (target == 1)

No change needed, program will give the correct output.

Question Number 139

Give the output of the following code snippet :

int main()
{
    int x=10;
    printf("%d, %d, %d\n", x< =5, x=20, x>=10);
    return 0;
}

1, 20, 1

0, 20, 1

0 ,0 ,1

0, 20, 0

Question Number 140

Give the output of the following code snippet :

#define VAR 100
void func();
void main()
{
    int a=100;
#define VAR 200
    func();
    printf("%d ",VAR+a);

}
void func()
{
    printf("%d ",VAR);
}

200 200

300 300

300 200

200 300

Question Number 141

When does the scanf() function stop execution?

When the format string is exhausted.

When input fails to match control specification.

Either 1 or 2

None of the above

Question Number 142

#include< stdio.h>

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

scanf("%d", &value);

if (value / i == 0)

if (flag == 0)

No change needed, program will give the correct output.

Question Number 143

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]);

    count = 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;
}

count = array[0];

location = count + 1;

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

No change needed, program will give the correct output.

Question Number 144

#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 / b;
    }

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

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

    return 0;
}

temp = b;

b = a % b;

a = temp / b;

No change needed, program will give the correct output.

Question Number 145

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;
    d[count] = '\0';

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

d[count] = s[count];

count++;

d[count] = '\0';

No change needed, program will give the correct output.

Question Number 146

The following program is used to delete an element from an array. Which of the following statement(s) given in the choices should be corrected and 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++)
            for (j = position - 1; j <  n - 1; j++)
                array[count] = array[j];

        printf("Resultant array : ");

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

    return 0;
}

for (j = position - 1; j < n - 1; j++) array[count] = array[j];

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

if (position >= n + 1) printf("Deletion not possible.\n");

No change needed, program will give the correct output.

Question Number 147

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

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

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

No change needed, program will give the correct output.

Question Number 148

Give the output of the following code snippet :

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

7 , 2 , 3

6 , 2, 4

8, 2, 3

8, 3 ,4

Question Number 149

#include < stdlib.h>

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

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

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

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

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

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

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

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

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

    return 0;
}

fs1 = fopen(fs2);

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

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

No change needed, program will give the correct output.

Question Number 150

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 151

Give the output of the following code :

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

Compiler error

Question Number 152

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

Used to get a char from input.

Used to get an integer as input.

Used to push a character back to the file

None of the above.

Question Number 153

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 154

#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 155



#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 156

C preprocessor is conceptually the first step during compilation.

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 157

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

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

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

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

    bubble_sort(array, n);

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

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

    return 0;
}

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

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

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

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

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

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

No change needed, program will give the correct output.

Question Number 158

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

Always true

Always false

Sometimes true and sometimes false.

Not enough information to provide the accurate answer.

Question Number 159



#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 160

Give the output of the following code snippet :

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

Output 'H' is printed on the screen.

No output

Compiler error.

Garbage value

Question Number 161

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 162

Give the output of the following code :

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

No output

Compiler error

Question Number 163


{
    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 164

string_length(char[]);

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

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

    return 0;
}

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

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

    return count;
}

length = string_length(str);

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

string_length(char[]);

No change needed, program will give the correct output.

Question Number 165

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 166

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

short

unsigned

signed

All of the above.

Question Number 167

#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 168

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 169

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 170

#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];
                temp = stud[j];
                stud[j] = temp;
            }

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

temp = stud[j];

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

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

No change needed, program will give the correct output.

Question Number 171

int string_length(char[]);

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

    printf("Input a string\n");
    scanf("%s", str[100]);
    length = string_length(str);
    printf("Length of string %s = %d\n", str, length);

    return 0;
}

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

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

    return count;
}

length = string_length(str);

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

scanf("%s", str[100]);

No change needed, program will give the correct output.

Question Number 172

Give the output of the following code snippet :

#define MSG Hello

int main()
{
    printf("MSG");
    return 0;
}

MSG

Hello

Compilation error

No output

Question Number 173

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;
}

stud[i].studId = i + 1;

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

scanf("%s", stud -> name);

No change needed, program will give the correct output.

Question Number 174

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

Question Number 175

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

float

char

long int

All of the above

Question Number 176

Which of the following functions are declared in the header file math.h?

sine()

isalpha()

isupper()

pow()

Question Number 177

The C pre-processors are specified with which symbol?

" "

None of the above

Question Number 178

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 179

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

    return 0;
}

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

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

    return count;
}

length = string_length(str);

int string_length(char[]);

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

No change needed, program will give the correct output.

Question Number 180

Give the output of the following code snippet :

int main()
{
    int i = 3;
    int l = i / -2;
    int k = i % -2;
    printf("%d %d\n", l, k);
    return 0;
}

-1 1

1 -1

-1 -1

Compiler error.

Question Number 181

Give the output of the following code snippet :

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

20 40

20 30

30 40

30 20

Question Number 182

Which of the following are conditional directives in C?

#ifdef

#endif

#ifndef

All of the above

Question Number 183

Name the escape sequence to print a new line character in printf function in C :

Question Number 184

Give the output of the following code snippet :

#define join(p,q) p##q
int main()
{
    int join(a,b)=45;
    printf("%d",ab);
    return 0;
}

No output

Compiler error

Question Number 185

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 186

The associativity of the left and right shift operators, << and >> is from :

Left to right.

Right to left

Either 1 or 2

None of the above.

Question Number 187

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

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

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

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

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

    return 0;
}

sub[count] = str;

sub[count] = str[position];

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

No change needed, program will give the correct output.

Question Number 188

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 ; 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 189

Which of the following is an example of an unsigned long hexadecimal constant:

0XF

0XDL

0XFUL

All of the above.

Question Number 190

Which of the following are types of C constants ?

Enumeration constants

Real or floating point constants.

Octal / Hexadecimal constants

All of the above.

Question Number 191

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 192

#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 193

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

char

int

char

double

Question Number 194

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 195

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

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

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

    copy_str(str,dest);

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

    return 0;
}

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

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

d[count] = s[count];

copy_str(str,dest);

d[count] = '\0';

No change needed, program will give the correct output.

Question Number 196

Give the output of the following code snippet :

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

30 30

40 20

30 20

40 30

Question Number 197

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 198

Give the output of the following code snippet :

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

No output

Compilation error

Question Number 199

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

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

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

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

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

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

    return 0;
}

value2 = temp;

scanf("%d", &value2);

value1 = value2;

No change needed, program will give the correct output.

Question Number 200

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

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

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

    temp = value1;
    value1 = value2;

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

    return 0;
}

value2 = temp;

value2 = temp /2;

value2 = value1 + value2;

No change needed, program will give the correct output.

Question Number 201

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

random()

rand()

srandom()

All of the above.

Question Number 202

#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 203

Which of the following are types of C constants ?

Integer constants

Real or floating point constants.

Character constants

All of the above.

Question Number 204

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 205

Give the output of the following code snippet :

extern void func();
extern int a;
int a=20;
void main()
{
    func();
}
void func()
{
    printf("%d",a);
}

No output

Compilation error

Question Number 206

#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 207

Give the output of the following code snippet :

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

200

Compilation error

Question Number 208

The following program is used to find the factorial 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 n, count;
    int fact = 1;
    printf("Enter a value: ");
    scanf("%d", &n);
    if (n<  0)
        printf("Factorial of negative number does not exist");
    else
    {
        printf("Factorial of %d is %d ",n,fact);
    }
    return 0;
}

for (count = 1; count < = n; ++count) { fact = fact % count; }

for (count = 1; count < = n; ++count) { fact = fact / count; }

for (count = 1; count < = n; ++count) { fact = fact * count; }

No change needed, program will give the correct output.

Question Number 209

#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 + 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;

reverse = reverse / 10;

No change needed, program will give the correct output.

Question Number 210

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

a = temp;

while (b == 0)

b = a % b;

No change needed, program will give the correct output.

Question Number 211

Give the output of the following code snippet :

#define FUNC(x)  while(i!=0) \
				{\
				  i--;\
				  x--;\
				  printf("%d ",x);\
				  }

int main()
{
    int z=10,i=2;
    FUNC(z);
}

10 10

10 9

9 8

9 9

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 % y;
    b = y;

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

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

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

    return 0;
}

a = x % y;

b = y;

a = temp;

No change needed, program will give the correct output.

Question Number 213

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

()

sizeof

Question Number 214

Give the output of the following code snippet :


#define A B + 2
#define B C + 4
#define C 10 + 5
int main()
{
    int var = A * B - C;
    printf("%d\n", var);
}

Question Number 215

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

#include < stdio.h>

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

printf("Enter the value to be checked : ");

scanf("%d", &value);

if ((value % 2) == -1)

No change needed, program will give the correct output.

Question Number 216

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

scanf("%f", &n2.real);

temp = Add();

temp.real = n1 + n2;

No change needed, program will give the correct output.

Question Number 217

Binary operators + and - have what priority ?

Same

+ has greater priority than -

- has greater priority than +

None of the above.

Question Number 218

#include< stdio.h>

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

scanf("%d", &value);

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

if (flag == 0)

No change needed, program will give the correct output.

Question Number 219

Give the output of the following code snippet :

void main()
{

    printf("%+07d\n", 762);

}

+0762

+762

+000762

0000762

Question Number 220

#include < stdio.h>

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

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

    a = x;
    b = y;

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

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

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

    return 0;
}

temp = b;

gcd = a;

lcm = (x + y) / gcd;

No change needed, program will give the correct output.

Question Number 221

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

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

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

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

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

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

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

    printf("Result array:\n");

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

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

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


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

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

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

    }
}

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

if (j < num1 && k < num2)

if (j < num1)

No change needed, program will give the correct output.

Question Number 222

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

int

char

float

None of the above.

Question Number 223

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

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

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

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

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

    maximum = array[0];

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

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

if (array[count] == maximum)

maximum = array[size];

maximum = array[count];

No change needed, program will give the correct output.

Question Number 224

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] == 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] == b[count])

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

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

No change needed, program will give the correct output.

Question Number 225

Give the output of the following code snippet :

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

Question Number 226

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

#include < stdio.h>

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

if (n> 0)

fact = fact * count;

int fact = 1;

No change needed, program will give the correct output.

Question Number 227

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

"%"

Question Number 228

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

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

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

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

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

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

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

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

No change needed, program will give the correct output.

Question Number 229

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 reordered to make the program compile, link and run and give the desired output?

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

temp = Add(n1, n2);

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

return(temp);

No change needed, program will give the correct output.

Question Number 230

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 < stdlibrary.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 < stdlibrary.h>

fclose(source);

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

No change needed, program will give the correct output.

Question Number 231

Give the output of the following code snippet :

void main()
{
    int x = 5.3 % 2;
    printf("%d", x);
}

2.3

0.3

Compiler error.

Question Number 232

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

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

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

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

    flag = str_compare(str1, str2);

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

    return 0;

}

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

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

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

break;

return 0;

continue;

No change needed, program will give the correct output.

Question Number 233

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 234

Give the output of the following code snippet :

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

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

Compilation error

Question Number 235

The unary + operator has greater priority than the binary + operator. State true or false :

Always true

Always false

Sometimes true and sometimes false.

No enough information to provide a valid answer.

Question Number 236

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

File is searched for only in the current working directory.

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

Either 1 or 2

None of the above.

Question Number 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 - 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 238

Give the output of the following code snippet :

void main()
{
    float x = 0.1;
    printf("%d, ", x);
    printf("%f", x);
}

0 0.1

0 0.100000

Garbage value 0.100000

No output

Question Number 239

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 240

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 241

#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 (temp < = 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;
}

while (temp < = 0)

gcd = a;

lcm = (x*y) / gcd;

No change needed, program will give the correct output.

Question Number 242

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 243

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);

    for (count = 1; count < = num; count++)
    {
        scanf("%d", &value);
    }

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

    return 0;
}

sum = sum + value;

sum = sum * value;

sum = sum / value;

No change needed, program will give the correct output.

Question Number 244

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

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

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

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

    bubble_sort(array, n);

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

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

    return 0;
}

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

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

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

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

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

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

No change needed, program will give the correct output.

Question Number 245

#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 246

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

void main()
{
    printf("Enter information for 1st distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist1.feet);
    printf("Enter inch: ");
    scanf("%f", &dist1.inch);
    printf("\nEnter information for 2nd distance\n");
    printf("Enter feet: ");
    scanf("%d", &dist2.feet);
    printf("Enter inch: ");
    scanf("%f", &dist2.inch);
    sum.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 247

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 248

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 249

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 250

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 251

Shifting a value x two positions to the right i.e x >> 2 is equivalent to :

Multiplication of x by 4.

Division of x by 4.

Adding x to 4.

Subtracting 4 from x.

Question Number 252

#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;
    }
    reverse = reverse + num % 10;
    if (value == reverse)
        printf(" %d is a Palindrome",value);
    else
        printf(" %d is not a Palindrome", value);

    return 0;
}

reverse = reverse + num % 10;

reverse = reverse * 10;

num = num / 10;

No change needed, program will give the correct output.

Question Number 253

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

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

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

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

    bubble_sort(array, n);

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

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

    return 0;
}

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

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

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

temp = arry[d + 1];

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

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

No change needed, program will give the correct output.

Question Number 254

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 255

#include < stdlib.h>

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

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

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

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

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

    fclose(source);
    fclose(target);

    return 0;
}

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

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

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

No change needed, program will give the correct output.