Function MCQs

The preprocessor provides the ability for . . . . . . . .

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    static double x;
    int x;
    printf("x is %d", x);
}

Which of the following operation is not possible in a register variable?

Which of the following Macro substitution are accepted in C?

What will be the output of the following C code?

#include <stdio.h>
# define max
void m()
{
    printf("hi");
}
void main()
{
    max;
    m();
}

What will be the output of the following C code?

#include <stdio.h>
#define foo(m, n) m ## n
int main()
{
    printf("%s\n", foo(k, l));
}

How is search done in #include and #include "somelibrary.h" according to C standard?