C Programming

Consider the following C code:

#include <stdio.h>
int *assignval(int *x, int val) {
      *x = val;
      return x;
}

void main () {
      int *x = malloc(sizeof(int));
      if(NULL == x) return;
       x = assignval(x,0);
       if(x) {
             x = (int *)malloc(sizeof(int));
             if(NULL == x) return;
             x = assignval(x,10);
       }
      printf("%d\n", *x);
      free(x);
}

The code suffers from which one of the following problems:

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 following C program.

void f(int, short);
void main()
{
     int i = 100;
     short s = 12;
     short *p = &s;
     __________ ;    // call to f()
}

Which one of the following expressions, when placed in the blank above, will NOT result in a type checking error?

Consider the following C program.

#include<stdio.h>

void mystery(int *ptra, int *ptrb) {
     int *temp;
     temp = ptrb;
     ptrb = ptra;
     ptra = temp;
}
int main() {
     int a=2016, b=0, c=4, d=42;
     mystery(&a, &b);
     if (a < c)
          mystery(&c, &a);
     mystery(&a, &d);
     printf("%d\n", a);
}

The output of the program is ________.

The value printed by the following program is ________.

void f(int* p, int m){
    m = m + 5;
    *p = *p + m;
    return;
}
void main(){
    int i=5, j=10;
    f(&i, j);
    printf("%d", i+j);
}

The output of the following C program is _____.

void f1(int a, int b) {
    int c;
    c=a; a=b; b=c;
}
void f2(int *a, int *b) {
    int c;
    c=*a; *a=*b; *b=c;
}
int main(){
    int a=4, b=5, c=6;
    f1(a,b);
    f2(&b, &c);
    printf("%d",c-a-b);
}

Consider the following C program segment.

#include <stdio.h>

int main()
{
    char s1[7] = "1234", *p;
    p = s1 + 2;
    *p = '0';
    printf("%s", s1);
}

What will be printed by the program?

Consider the following program in C language:

#include <stdio.h>

main()
{
    int i;
    int *pi = &i;

    scanf("%d",pi);
    printf("%d\n", i+5);
}

Which one of the following statements is TRUE?

Consider the function func shown below:

int func(int num) {
    int count = 0;
    while (num) {
        count++;
        num>>= 1;
    }
    return (count);
}

The value returned by func(435) is _____.

Suppose n and p are unsigned int variables in a C program. We wish to set p to $^nC_3$. If n is large, which one of the following statements is most likely to set p correctly?

The minimum number of arithmetic operations required to evaluate the polynomial $P(X) = X^5 + 4X^3 + 6X + 5$ for a given value of $X$, using only one temporary variable is _____.

What will be the output of the following C program segment?

char inChar = 'A' ;
switch ( inChar ) {
case 'A' : printf ("Choice A\n") ;
case 'B' :
case 'C' : printf ("Choice B") ;
case 'D' :
case 'E' :
default  : printf ( " No Choice" ) ; }

What does the following fragment of C program print?

char c[] = "GATE2011";
char *p  = c;
printf("%s", p + p[3] - p[1]);