ask several questions about different circuits. Mang small questions, but you need to answer quickly, the interviewers are not very patient. Just like given two different current sources, which one performs better.

Talked to a recruiter at my school's career fair and was contacted soon after for a 30 min phone screen. The process was a fairly simple one. I had two phone screens, one with the hiring manager and one with a person on the team I was going to be working with. The first interview was a bit difficult since I got nervous but the second was much better. Both calls were about 45 mins and focused only on technical questions, no questions were asked about my resume or experience until the last 2 mins of the second call. A great learning experience.