Function MCQs

What will be the output of the following C code?

#include <stdio.h>
void foo();
int main()
{
    void foo(int);
    foo(1);
    return 0;
}
void foo(int i)
{
    printf("2 ");
}

Which of the following is an external variable in the following C code?

#include <stdio.h>
int func (int a)
{
    int b;
    return b;
}
int main()
{
    int c;
    func (c);
}
int d;

C preprocessors can have compiler specific features.

In a conditional inclusion, if the condition that comes after the if is true, then what will happen during compilation?

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    #define max 37
    printf("%d", max);
}

Which of the following properties of #define is not true?

What is a preprocessor?

What will be the output of the following C code?

#include <stdio.h>
#define MIN 0
#if MIN
#define MAX 10
#endif
int main()
{
    printf("%d %d\n", MAX, MIN);
    return 0;
}

What is the scope of an external variable?