File Input Output MCQs

What will be the output of the following C code?

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

Which of the following is the correct declaration for ungetc?

What is the purpose of sprintf?

What will be the output of the following C code?

#include <stdio.h>
#include <math.h>
int main()
{
    int i = 10;
    printf("%f\n", log10(i));
    return 0;
}

Memory allocation using malloc() is done in . . . . . . . .

Which is true about isaplpha(c), where c is an int that can be represented as an unsigned?

char or EOF.isalpha(c) returns

For the function call time(), what type of parameter is accepted?

fwrite() can be used only with files that are opened in binary mode.

What is meant by 'a' in the following C operation?

fp = fopen("Random.txt", "a");