I was set up for a phone interview through a connection with my graduate advisor. The interview didn't go too well, and I never got a call back. I think the interviewer was not impressed by my hardware experience, since I couldn't describe the entire process of designing a converter from scratch. I would recommend being prepared to talk about how you would design a converter from the ground up, and be sure to press for clarifications and/or constraints. I think I was asked "how would you design a flyback converter?" which is a terrible question, but I didn't help myself by narrowing down the design parameters. Most reviews for Cree emphasize the oppressive working hours, and my interviewer obliquely brought that up by asking, basically, if I had ever stayed up all night working on a problem. I love what Cree is doing with LED lighting, but I think you have to be crazy to be an engineer there.

A 30 minutes Phone interview with two interviewers in the same group. One leads the discussion and ask questions according to your previous experience and the other ask a few general questions occasionally.