Initially there was a phone screening interview in which several programming theory questions were asked, such as describe Object Oriented programming. Then (or maybe before the phone interview), there was a quasi-IQ test that took about 2 hours to complete. My only advice is to not do this in the middle of the night. While I still passed, I think I would have done much better if I was fully awake. Last, was the in-person interview, in which you take part of the test again, to make sure you didn't have someone else take it for you before. If you make it this far, it's pretty hard to screw it up. Just be prepared with the typical interview questions and also be prepared to do a programming exercise or two on the white board. They're looking for potential rather than cold hard experience, so try to focus on why you have potential.