My first interview was on campus. I had previously attended a career fair and recruiting event to get to know some of the representatives. The first round was just one 1:1 interview. Not difficult. I was basically told at the end I would be receiving a second interview. About a month later I went to their office for second round interviews. There was breakfast and a short presentation. Then I went through three 30 minute interviews. No hard questions. All conversational. Just found a way to relate my experiences to the qualities that they are looking for in an employee. We had lunch afterward and they called me and made an offer about 30 minutes after I left the office.