Q1:

What will be the output of the program?

#include<stdio.h>
#include<string.h>

int main()
{
    char dest[] = {97, 97, 0};
    char src[] = 'aaa';
    int i;
    if((i = memcmp(dest, src, 2))==0)
        printf('Got it');
    else
        printf('Missed');
    return 0;
}

memcmp compares the first 2 bytes of the blocks dest and src as unsigned chars. So, the ASCII value of 97 is 'a'.
if((i = memcmp(dest, src, 2))==0) When comparing the array dest and src as unsigned chars, the first 2 bytes are same in both variables.so memcmp returns '0'.
Then, the if(0=0) condition is satisfied. Hence the output is 'Got it'.