File Input Output MCQs

For a typical program, the input is taken using . . . . . . . .

What is the return value of putchar()?

What will be the output of the following C code?

#include <stdio.h>
int f(char chr, ...);
int main()
{
    char c = 97;
    f(c);
    return 0;
}
int f(char c, ...)
{
    printf("%c\n", c);
}

What will be the output of the following C code?

#include <stdio.h>
#include <string.h>
int main()
{
    char line[3];
    fgets(line, 3, stdin);
    printf("%d\n", strlen(line));
    return 0;
}

What will be the output of the following C code?

char str[] =”Good”;
scanf(“%s”, str);

What type of return-type used in String operations?

The function . . . . . . . . obtains a block of memory dynamically.

What happens when we use the following C statement?

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    FILE *fp = stdout;
    int n;
    fprintf(fp, "%d ", 45);
    fflush(stdout);
    fprintf(stderr, "%d", 65);
    return 0;
}