Linux Startup and Shutdown Interview Question:

Program given below will allocate the memory of ___ bytes for pointer "ptr".

#include<stdio.h>
#include<stdlib.h>

int main()
{
int *ptr;
ptr = (int*)malloc(sizeof(int)*4);
ptr = realloc(ptr,sizeof(int)*2);
return 0;
}
a) 2
b) 4
c) 8
d) none of the mentioned

Submitted by: Murtaza

c) 8
Explanation:
We can also use the realloc() to make memory block smaller.
Submitted by: Murtaza