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I have left the interviews thinking I was HOPING I wouldn't hear back from the company. I felt their demonstration of how they discerned good programmers from bad ones was different than my own ideas & just didn't feel comfortable with that mindset.
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I find it interesting that one question to try to see how much OOP knowledge would be a knock out question for you. Are you thinking you would be working with other developers that were not qualified because you didn't like the hiring process?