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 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. 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?

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 __________.

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

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);
}

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 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 _____.