C Input/Output file MCQ

1. printf
2. fprintf
3. putchar
4. scanf

1. scanf
2. Files
3. Command-line
4. All of the mentioned

1. It runs prog1 first, prog2 second
2. It runs prog2 first, prog1 second
3. It runs both the programs, pipes output of prog1 to input of prog2
4. It runs both the programs, pipes output of prog2 to input of prog1

1. char
2. int
3. char *
4. reading character doesn’t require a return-type

1. -1
2. 0
3. 1
4. 10

1. The next input character each time it is called
2. EOF when it encounters end of file
3. The next input character each time it is called EOF when it encounters end of file
4. None of the mentioned

1. The symbolic constant EOF is defined in
2. The value is -1
3. The symbolic constant EOF is defined in & value is -1
4. I Only value is -1

1. The character written
2. EOF if an error occurs
3. Nothing
4. Both character written & EOF if an error occurs

1. The function tolower is defined in
2. Converts an uppercase letter to lowercase
3. Returns other characters untouched
4. None of the mentioned

#include 
    int main()
    {
        char c = '�';
        putchar(c);
    }

1. Compile time error>
2. Nothing
3. 0
4. Undefined behaviour