One person from the service desk interviewed me, one manager interveiwed me. I actually first applied in December 2008. It was my first interview and I had no job experience. They asked me questions like, "Tell me about a time you had to finsih a task and it didn't go as planned. What did you do to solve the problem?" I went blank. Didn't get the job, needless to say.
In May 2009, I re-applied, this time with job experience under my belt and a memory for those deer-in-the-headlights questions and adequate preparation. :-}
In short: Be prepared and tay on your guard.