Apple Product Design Engineer interview questions

Had 2 rounds of phone interview. First with an HR and with project hiring manager. Interview with HR took about 20 minutes. She talked about the company and the position. Then did 30 minutes phone interview with the project manger and was asked about some project experiences.

I got contacted by a recruiter that I met at a career fair, and had a couple phone interviews. After two phone interviews with two people on the PD team, I did not end up getting another round. I was not prepared for the questions they were going to ask me. I definitely should have prepared more because they try to stump you. They asked me some behavioral questions like what are your 3 biggest weaknesses as and engineer, as well as hard technical ones that I could have answered by reading off a table from a textbook. In fact, I indicated that I could look it up, and got scolded as I was informed that that was not the point of this technical interview. So word of advice: Ask politely before any technical questions if its okay to look something up, or just don't look stuff up. The advice that I got from them afterward was that they just want to see my process, so always explain your thoughts.