Home » C » Interview Questions on Union in C

Interview Questions on Union in C : (4)

Question: 1

Is it mandatory that the size of all elements in a union should be same?

(A) Yes
(B) No

Compiler
Practitioner union[Posted by: Admin | Chicago, USA]

Question: 2

/* Assume you are on 32 bit system */

#include <stdio.h>

union example{
    char ch;
    int no;
};

int main(){
    
printf("%d", sizeof(union example));
return 0;
}

(A) 3
(B) 4
(C) 5
(D) 6

Compiler
Beginner union[Posted by: Admin | Chicago, USA]

Question: 3

/* find the output of below code on Union in C */
#include "stdio.h"

union example{
    int a;
    int b;

};

int main(){
union example obj;
obj.a = 10;
printf("%d %d", obj.a, obj.b);
return 0;
}

(A) 10 0
(B) 10 GarbageValue
(C) 10 10
(D) 0 0

Compiler
Beginner union[Posted by: Admin | Chicago, USA]

Question: 4

#include "stdio.h"

union example{
    int a;
    int b;

};

int main(){
    union example obj;
    obj.a = 88;
    printf("%d", obj.a);
    obj.b = 99;
    printf("%d", obj.b);
    return 0;
}

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Interview Questions on Union in C : (4)

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