They ask the same general questions that you should prepare for, with a few random ones mixed in. Why do you want to work here, what is your worst quality, explain a time you had a conflict at work at how you resolved it, etc. Prepare and know the general idea of what you're going to say. At the interview, I usually fake thinking about it for about as long as it took me to think of the questions I hadn't prepared for (a second or two). This way it seems as though I haven't prepared at all and am just so smart as to give these perfect answers off the top of my head.
I'm 4/4 so far!