They have a couple of rounds of interview questions. Both technical and situational. If you can't answer a technical question don't like or else they will strictly go to technical questions. Be honest and transparent.

I was first interviewed over the phone by their campus recruiter and invited back to do an on-site interview. I was interviewed by the project manager, the head of IT, and by the CFO. They where very friendly and made me feel very relaxed. The on-site interview took a total of an hour and a half with back to back 30 minute interviews.