That depends on the school and you. I had a lot of questions about clinics, because I am a PI person and really need the experience.
I also asked had quite a few about living in New Orleans, how the criminal justice system was being recast and how to get involved with that process as a student.
Your questions should focus on things you are interested in, or need more info about.
I forgot to ask about 80 percent of mine because they told me I was in within 3 minutes of sitting down. My head went a little blank after that.