Southern writes:  

Acing last year's quiz was nothing. Only true hacker heroes will survive Round 2

Back for more, eh? Our last programming quiz had seasoned pros pulling their hair out with its tangle of trick questions, obscure trivia, and the occasional bad pun. But if you think you have what it takes, we've assembled another batch of 20 questions covering the history, techniques, and jargon of software development. If you can answer them all, you're well on your way to the heights of hackerdom. Just don't let your guard down, because we might try to trick ya!

more: Programming IQ test: Round 2

also: Open source IQ test