File Input Output MCQs

Why do we write (int *) before malloc?

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

What type of inputs are accepted by mathematical functions?

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp;
    char c;
    int n = 0;
    fp = fopen("newfile1.txt", "r");
    while (!feof(fp))
    {
        c = getc(fp);
        putc(c, stdout);
    }
}

What will be the output for the given code.

printf("\n The number is %07d",1212);

Which of the following will return a result most quickly for searching a given key?

Which of the following macro extracts an argument from the variable argument list (ie ellipsis) and advance the pointer to the next argument?

calloc() initialize memory with all bits set to zero.

Which of the following snippet will effectively generate random numbers?

The statement prog < infile causes . . . . . . . .