Apple Hardware Engineer interview questions

Apple had a networking even in our university. I submit my resume there and couple days later I got an email about setting up a phone interview. The first phone interview came pretty soon and I just talked about stuff I did on my resume and they asked couple questions around the resume. They said they are interested and would want to move forward. I flew to CA and had a interview with around 8 people. From 9:30 to 4:30. The interview is kind of hard, I managed to screw up one of the interview. But still got an offer.