Question

What will be the output of the program? 
#include int main() 
{ union var { int p, q; } u; u.p = 100; u.q = 50; 
printf("%d\n", u.p); 
return 0; }

• A. 100
• B. 50
• C. 150
• D. Error

Hint:

Unions store all variables in the same memory location — only the last assignment is retained.

Answer 1

The Correct Option is B

In a union, all members share the same memory. When `u.q = 50` is assigned, it overwrites `u.p`. So printing `u.p` gives 50.