Very easy you wont get asked many questions at all. He will explain the rules of the job and expectations. Very easy and not much to practice for. If you got an interview chances are that you already have the job.
I applied in-person. The process took 1 day. I interviewed at Stefanos Restaurant (Bethlehem, PA) in Apr 2011
Interview
The interview was one on one and was very brief. Very little information was given and very little information was asked of. But it was only for a serving position so it was fairly normal.
Interview questions [1]
Question 1
No unexpected questions were asked. They were all very basic.