We give a technical quiz as part of our interview process. When we started the technical quiz with one candidate he became indignant and told me that he has been a programmer for over 20 years and the quiz was an insult to his skills. He promptly failed the first question that is basic programming question. His response? "Oh, yeah... I guess it's good you test people..." I proceeded to ask him the most difficult questions I could think of and crushed his arrogant ass!