Once preprocessing is over and the program is sent for the compilation the macros are removed from the expanded source code.

Will the program compile successfully?

#include<stdio.h>
#define X (4+Y)
#define Y (X+3)

int main()
{
    printf("%d\n", 4*X+2);
    return 0;
}

Would the following typedef work?
typedef #include l;

Will the program compile successfully?

#include<stdio.h>

int main()
{
    printf("India" "BIX\n");
    return 0;
}

It is necessary that a header files should have a .h extension?

Will the program compile successfully?

#include<stdio.h>

int main()
{
    #ifdef NOTE
        int a;
        a=10;
    #else
        int a;
        a=20;
    #endif
    printf("%d\n", a);
    return 0;
}

Will the following program print the message infinite number of times?

#include<stdio.h>
#define INFINITELOOP while(1)

int main()
{
    INFINITELOOP
    printf("IndiaBIX");
    return 0;
}

Will it result in to an error if a header file is included twice?

Can we use a switch statement to switch on strings?

Bitwise can be used to reverse a sign of a number.