Q91 What is union in C? Where we use union? July 19, 2015 Gyantoday Most Important Interview Questions In C Leave a comment Share this: Q90 What is bit field in C?DateJuly 19, 2015In relation toMost Important Interview Questions In CQ55 What is difference and purpose of using exit() and return() in a function?DateJuly 18, 2015In relation toMost Important Interview Questions In CQ63 What is memory leak?DateJuly 19, 2015In relation toMost Important Interview Questions In C