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Interview Questions on Macros in C : (10)

Question: 1

Which one of the following is invalid macro in C programming?

(A) #pragma
(B) #error
(C) #ifndef
(D) #elseif

Compiler
Level: Expert Category of MCQ: macros

Question: 2

#define x 10 * 10
#include <stdio.h>

int main()
{
    int a = x + x;
    printf("%d",a);
    return 0;
}

(A) 20
(B) 10
(C) 100
(D) 200

Compiler
Level: Practitioner Category of MCQ: macros

Question: 3

#define x 10 + 5
#include <stdio.h>

int main()
{
    int a = x * x;
    printf("%d",a);
    return 0;
}

(A) 225
(B) 65
(C) 85
(D) 155

Compiler
Level: Practitioner Category of MCQ: macros

Question: 4

#define x 10
#include <stdio.h>

int main()
{
    x = 20;
    printf("%d", x);
    return 0;
}

(A) 20
(B) 10
(C) 0
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: macros

Question: 5

#define x 10
#include <stdio.h>

int main()
{
    x++;
    printf("%d", x);
    return 0;
}

(A) 10
(B) 11
(C) Compilation Error
(D) Not Defined

Compiler
Level: Practitioner Category of MCQ: macros

Question: 6

#define x 10
#define x 20
#include <stdio.h>

int main()
{
    printf("%d", x);
    return 0;
}

(A) 10
(B) 20
(C) 0
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: macros

Question: 7

#define x 10;
#define x 20;
#include <stdio.h>

int main()
{
    printf("%d", x);
    return 0;
}

(A) 10
(B) 20
(C) 0
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: macros

Question: 8

#define x 10

int main()
{
    printf("%d %c", x);
    return 0;
}

(A) 10 Garbage
(B) Garpage 10
(C) 10 0
(D) Compilation Error

Compiler
Level: Practitioner Category of MCQ: macros

Question: 9

#define x 65

int main()
{
    printf("%d %c", x, x);
    return 0;
}

(A) 65
(B) 65 65
(C) 65 a
(D) 65 A

Compiler
Level: Practitioner Category of MCQ: macros

Question: 10

#define x 65

int main()
{
    printf("%d", x+5+x/5);
    return 0;
}