CS/IT Gate Subject



C Programming GATE CS and IT previous year questions with Answer


Ques 1 Gate 2024 Set-1

Consider the following C program:

Which one of the following statements is CORRECT?

A

The program prints 9 as output

B

The program prints 10 as output

C

The program gets stuck in an infinite loop

D

The program prints 6 as output



Ques 2 Gate 2024 Set-1

Consider the following C program:

Assume that the input to the program from the command line is 1234 followed by a newline character. Which one of the following statements is CORRECT?

A

The program will not terminate

B

The program will terminate with no output

C

The program will terminate with 4321 as output

D

The program will terminate with 1234 as output



Ques 3 Gate 2022

What is printed by the following ANSI C program?

#include<stdio.h>
int main(int argc, char *argv[])
{
    int a[3][3][3] =
    {{1, 2, 3, 4, 5, 6, 7, 8, 9},
    {10, 11, 12, 13, 14, 15, 16, 17, 18},
    {19, 20, 21, 22, 23, 24, 25, 26, 27}};
    int i = 0, j = 0, k = 0;
    for( i = 0; i < 3; i++ ){
        for(k = 0; k < 3; k++)
            printf(“%d”, a[i][j][k]);
       printf (“\n”);
}

A

1  2  3
10 11 12
19 20 21

B

1  4   7
10 13 16
19 22 25

C

1 2 3
4 5 6
7 8 9

D

1   2   3
13 14 15
25 26 27



Ques 4 Gate 2022

What is printed by the following ANSI C program?

#include<stdio.h>
int main(int argc, char *argv[])
{
    int x = 1, z[2] = {10, 11};
    int *p = NULL;
    p = &x;
    *p = 10;
    p = &z[1];
    *(&z[0] + 1) += 3;
    printf("%d, %d, %d ", x, z[0], z[1]);
    return 0;
}

A

1,10,11

B

1,10,14

C

10,14,11

D

10,10,14



Ques 5 Gate 2020

Consider the following C functions.

int tob (int b, int* arr) {
    int i;
    for (i = 0; b>0; i++) {
    if (b%2)
      arr [i] = 1;
    else
      arr[i] = 0;
    b = b/2;
    }
    return (i);
}

int pp(int a, int b) {
    int arr[20];
    int i, tot = 1, ex, len;
    ex = a;
    len = tob(b, arr);
    for (i=0; i     if (arr[i] ==1)
      tot = tot * ex;
    ex= ex*ex;
    }
    return (tot) ;
}


The value returned by pp(3,4) is ________ .


81 is the correct answer.


Ques 6 Gate 2020

Consider the following C functions.

int fun1(int n)
{
    static int i= 0;
    if (n > 0) {
      ++i;
      fun1(n-1);
    }
    return (i);
}

int fun2(int n) {
    static int i= 0;
    if (n>0) {
      i = i+ fun1 (n) ;
      fun2(n-1) ;
    }
    return (i);
}

The return value of fun2(5) is ________ .


55 is the correct answer.


Ques 7 Gate 2020

Consider the following C program.
#include <stdio.h>
int main () {
    int a[4][5] = {{1, 2, 3, 4, 5},
      {6, 7, 8, 9, 10},
      {11, 12, 13, 14, 15},
      {16, 17, 18, 19, 20}};
    printf("%dn", *(*(a+**a+2)+3));
    return(0);
}

The output of the program is _______


19 is the correct answer.


Ques 8 Gate 2019

Consider the following C program:

#include<stdio.h>
int main() {
    int a[] = {2, 4, 6, 8, 10};
    int i, sum = 0, *b = a + 4;
    for (i = 0; i < 5; i++ )
        sum = sum + (*b - i) - *(b - i);
        printf("%d\n", sum);
    return 0;
}
The output of above C program is __________


10 is the correct answer.


Ques 9 Gate 2019

Consider the following C program:

#include<stdio.h>
int main() {
    float sum = 0.0, j = 1.0, i = 2.0;
    while (i / j > 0.0625) {
        j = j + j;
        printf("%f ", sum);
    };
    return 0;
}

The number of times variable sum will be printed When the above program is executed is _________ .


a is the correct answer.


Ques 10 Gate 2019

Consider the following C program:

#include<stdio.h>
int main(){
    int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 5}, *ip = arr + 4;
    printf("%dn", ip[1]);
   return 0;
}


The number that will be displayed on execution of the program is _________ .


a is the correct answer.