Q: How will you free the allocated memory?

A remove(var-name);
B free(var-name);
C delete(var-name);
D dalloc(var-name);
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Learn More MCQ Questions from C Programming Language Union in C Language

Union is an user defined datatype in C programming language. It is a collection of variables of different datatypes in the same memory location. We can define a union with many members, but at a given point of time only one member can contain a value. Unions can be very handy when you need to talk to peripherals through some memory mapped registers.