C Programming - Medium

Whether C code will compile without main() function?

• Yes

• No

Format specifier for size_t is:

• %s

• %p

• %zu

• %ld

• %i

What is output of this code:

#include <stdio.h>

int main(){

int y = 3;

printf("%d %d %d",y,y,y++,++y);

}

• 3 3 3

• 5 5 4

• 3 3 4

• 4 4 5

What is output of this code:

#include <stdio.h>

#define ARR_SIZE 10

int main(){

int arr[ARR_SIZE] = {-1};

int *ptr1 = &(arr[0]), *ptr2 = &(arr[4]);

printf("%p",ptr2-ptr1);}

• 4

• Compile Error

• 0x4

• 0x16

• 16

Select existing signals

• SIGILL

• SIGTERM

• SIGRET

• SIGEXT

• SIGFPE

In which libraries NULL macro is defined?

• stdlib.h

• stdio.h

• assert.h

• stddef.h

• stdbool.h

Which macro may return 31?

int x = 2, y= 3, z;

z= RAT(x++,++y);

• #define RAT (A,B) ( ((A) * (A)) + ((B) * (B)) )

• #define RAT (A,B) ( ((A) * (2)) + ((B) * (2)) )

• #define RAT(A,B) ( ((A) * (A)) + ((B) * (B)) )

• #define RAT(A,B) ( ((A) * (2)) + ((B) * (2)) )

• #define RAT(A,B) ( ((A) * (B)) + ((B) * (B)) )

What is output for this code:

int *p = (int*)malloc(sizeof(int));

int *q = (int*)realloc(p, sizeof(int));

*p = 1; *q = 2;

if (p == q) printf("%d%d", *p, *q);

• Compile Error

• 12

• Undefined Behaviour

• 22

• Runtime Error

What is output for this code:

volatile static int x = 15;

fork();

printf("%d ",++x);

if (fork() == 0) {

x += 5; printf("%d ", x);

}else {

x -= 5; printf("%d ", x);}

• 16 11 16 21 16 11 16 21

• 16 11 16 21

• 16 11 17 11 18 21 19 21

• 11 16 11 16 21 16 21

• 16 11 16 11 16 21 16 21

Which one is NOT a C compiler

• GCC

• CFront

• Clang

• Icc

• QuickC