C Programming

In C runtime environment, which one of the following is stored in heap?

Consider the following three ANSI-C programs, P1, P2, and P3. P1

#include <stdio.h>
int a=5;
int main(){
  int a=7;
  return(0);
}

P2

#include <stdio.h>
int main(){
  int a=5;
  int a=7;
  return(0);
}

P3

#include <stdio.h>
int main(){
  int a=5;
  float a=7;
  return(0);
}

Which one of the following statements is true?

Consider the following ANSI-C program.

#include <stdio.h>
int main(){
  int *ptr, a, b, c;
  a=5; b=11; c=20;
  ptr=&a; *ptr=c; ptr=&c;
  a=*(&b); c=*ptr-a;
  printf("%d",c);
  return(0);
}

The output of this program is ____________. (*answer in integer*) *Note*: Assume that the program compiles and runs successfully.

Consider the following C program:

#include <stdio.h>
void stringcopy(char *, char *);
int main(){
  char a[30] = "@#Hello World!";
  stringcopy(a, a + 2);
  printf("%s\n", a);
  return 0;
}
void stringcopy(char *s, char *t) {
  while(*t)
    *s++ = *t++;
}

Which ONE of the following will be the output of the program?

int x=126,y=105;
do {
     if(x>y) x=x-y;
     else y=y-x;
} while(x!=y);
printf("%d",x);

The output of the given C code segment is ________. (Answer in integer)

Consider the following C program:

#include <stdio.h>
int main(){
  int a;
  int arr[5] = {30,50,10};
  int *ptr;
  ptr = &arr[0] + 1;
  a = *ptr;
  (*ptr)++;
  ptr++;
  printf("%d", a + (*ptr) + arr[1]);
  return 0;
}

The output of the above program is ___________. (Answer in integer)

Consider the following C program:

#include <stdio.h>

int g(int n) {
    return (n+10);
}

int f(int n) {
    return g(n*2);
}

int main() {
    int sum, n;
    sum=0;
    for (n=1; n<3; n++)
        sum += g(f(n));
    printf ("%d", sum);
    return 0;
}

The output of the given C program is ________. (Answer in integer)

Consider the following C program. Assume parameters to a function are evaluated from right to left.

#include <stdio.h>
int g(int p) { printf("%d", p); return p; }
int h(int q) { printf("%d", q); return q; }
void f(int x, int y) {
  g(x);
  h(y);
}
int main() {
  f(g(10),h(20));
}

Which one of the following options is the CORRECT output of the above C program?

Consider the following C function definition.

int fX(char *a){
    char *b = a;
    while(*b)
        b++;
    return b - a;}

Which of the following statements is/are TRUE?

What is the output of the following C program?

#include <stdio.h>
int main() {
    double a[2]={20.0, 25.0}, *p, *q;
    p = a;
    q = p + 1;
    printf("%d,%d", (int)(q - p), (int)(*q - *p));
    return 0;}

Consider the following ANSI C program.

#include <stdio.h>
int main(){
  int arr[4][5];
  int i, j;
  for (i=0; i<4; i++){
    for (j=0; j<5; j++){
      arr[i][j] = 10*i + j;
    }
  }
  printf("%d", *(arr[1] + 9));
  return 0;
}

What is the output of the above program?

Consider the following ANSI C function:

int SomeFunction(int x, int y)
{
  if ((x == 1) || (y == 1)) return 1;
  if (x == y) return x;
  if (x > y) return SomeFunction(x - y, y);
  if (y > x) return SomeFunction(x, y - x);
}

The value returned by SomeFunction(15, 255) is __________.

Consider the following ANSI C program:

#include <stdio.h>
#include <stdlib.h>
struct Node{
        int value;
        struct Node *next;};
int main(){
    struct Node *boxE, *head, *boxN; int index = 0;
    boxE = head = (struct Node *) malloc(sizeof(struct Node));
    head->value = index;
    for (index = 1; index <= 3; index++){
        boxN = (struct Node *) malloc(sizeof(struct Node));
        boxE->next = boxN;
        boxN->value = index;
        boxE = boxN; }
    for (index = 0; index <= 3; index++) {
        printf("Value at index %d is %d\n", index, head->value);
        head = head->next;
        printf("Value at index %d is %d\n", index+1, head->value); } }

Which one of the statements below is correct about the program?

Consider the following ANSI C program.

#include <stdio.h>

int foo(int x, int y, int q)
{
    if ((x <= 0) && (y <= 0))
        return q;
    if (x <= 0)
        return foo(x, y-q, q);
    if (y <= 0)
        return foo(x-q, y, q);
    return foo(x, y-q, q) + foo(x-q, y, q);
}

int main()
{
    int r = foo(15,15,10);
    printf("%d", r);
    return 0;
}

The output of the program upon execution is ________.

Match the following:

(P) static char var;          (i)   Sequence of memory locations to store addresses
(Q) m = malloc(10);           (ii)  A variable located in data section of memory
    m = NULL;
(R) char *ptr[10];            (iii) Request to allocate a CPU register to store data
(S) register int var1;        (iv)  A lost memory which cannot be freed

Consider the following function implemented in C:

void printxy(int x, int y) {
       int *ptr;
       x = 0;
       ptr = &x;
       y = *ptr;
       *ptr = 1;
       printf("%d,%d",x,y);
}

The output of invoking printxy(1,1) is

Consider the C program fragment below which is meant to divide x by y using repeated subtractions. The variables x, y, q and r are all unsigned int.

while (r >= y) {
   r = r - y;
   q = q + 1;
}

Which of the following conditions on the variables x, y, q and r before the execution of the fragment will ensure that the loop terminates in a state satisfying the condition x == (y*q + r)?

Consider the following snippet of a C program. Assume that swap(&x, &y) exchanges the contents of x and y.

int main() {
      int array[] = {3, 5, 1, 4, 6, 2};
      int done = 0;
      int i;

      while (done == 0) {
            done = 1;
            for (i=0; i<=4; i++) {
                  if (array[i] < array[i+1]) {
                        swap(&array[i], &array[i+1]);
                        done = 0;
                  }
            }
            for (i=5; i>=1; i--) {
                  if (array[i] > array[i-1]) {
                        swap(&array[i], &array[i-1]);
                        done = 0;
                  }
            }
      }
      printf("%d",array[3]);
}

The output of the program is ________.

Consider the following C Program.

#include<stdio.h>
int main() {
        int m = 10;
        int n, n1;
        n = ++m;
        n1 = m++;
        n--;
        --n1;
        n -= n1;
        printf("%d", n);
        return 0;
}

The output of the program is ________.

Consider the following C Program.

#include<stdio.h>
#include<string.h>
int main() {
        char* c = "GATECSIT2017";
        char* p = c;
        printf("%d", (int)strlen(c+2[p]-6[p]-1));
        return 0;
}

The output of the program is ________.