File Input Output- C Programming MCQ Questions and Answers

#include <stdio.h>
#include <math.h>
void main()
{
    int k = sqrt(-4);
    printf("%d\n", k);
}

#include <stdio.h>
#include <ctype.h>
int main()
{
    char i = 9;
    if (isdigit(i))
        printf("digit\n");
    else
        printf("not digit\n");
        return 0;
}