Unions Easy Questions and Answers

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

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 would be the size of the following union declaration? (Assuming size of double = 8, size of int = 4, size of char = 1)

#include <stdio.h>
    union Test
    {
        double n1;
        int n2[10];
        char n;
    }t;

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