Like all Big 4 firms, you start off with an on-campus interview and then if you are selected for round 2, you'll go to the office that you want to spend your internship. The first interview was just going through my resume, talking about the different experiences I had, and so on. Mostly behavioral style of questions. The second interview was basically a conversation. They wanted to make sure I was able to hold a conversation with someone (future client). Not too bad really.