1. 

In the following program how long will the for loop get executed? 

#include<stdio.h>
int main()
{
    int i=5;
    for(;scanf("%s", &i); printf("%d\n", i));
    return 0;
}


A. The for loop would not get executed at all
B. The for loop would get executed only once
C. The for loop would get executed 5 times
D. The for loop would get executed infinite times

Answer: Option D

Explanation:

During the for loop execution scanf() ask input and then printf() prints that given input. This process will be continued repeatedly because, scanf() returns the number of input given, the condition is always true(user gives a input means it reurns '1').

Hence this for loop would get executed infinite times.