I was called the day after I applied online. The application included one of those long personality inventories, but otherwise was pretty concise. I went in for my interview I believe a few days after the phone call. They asked some basic introductory questions: where I was from, what was I going to school for, what my previous job was, and when I left. That all took only about ten minutes. Then, for about 15 minutes, they described the work culture there: the importance of timeliness and consistency, the required uniform, and the shifts they expected to give me and what those shifts specifically entailed. I was hired on the spot, brought into the back room to meet the staff currently working, and given training shifts starting the next day. I think they were desperate for employees at this point. Overall, a very breezy interview. Pro-tip: they don't expect you to dress up, per se, but are always pleased when you do. Dress for the job you want, not the job you'll have.

Very simple and straightforward. Normal questions like availability, have you worked in food service before, etc. I think it depends on location though since friends at other locations have had more substantive or less substantive interviews.