Unions Easy Questions and Answers

What type of data is holded by variable u int in the following C code?

#include <stdio.h>
    union Example
    {
        int Nval;
        float Fval;
        char *Sval;
    } e;

Will be large enough to hold the largest of the three types;

What will be the output of the following C code (Assuming size of int and float is 4)?

#include <stdio.h>
    union
    {
        int Nval;
        float Fval;
    } U;
    void main()
    {
        printf("%d", sizeof(U));
    }

In the following C code, we can access the 1st character of the string sval by using _______.

#include <stdio.h>
    struct
    {
        char *Name;
        union
        {
            char *Str;
        } u;
    } tab[15];

Both tab[i].u.Str[0]. & *tab[i].u.Str

Members of a union are accessed as________________.

both union-pointer->member & union-name.member

Which member of the union will be active after REF LINE in the following C code?

#include <stdio.h>
    union test
    {
        int n;
        float fl;
        char ch;
    };
    union test t = {11,12.25,’N’}; //REF LINE

Unions