Advice for interview @ hospital?

I'll be going for an interview as a CNA in the Transitional Care Unit in a nearby hospital. This would be my first job as a CNA to be honest, and I was wondering if anyone had some advice on the interview. I will also be having a "peer interview" the same day, where I shadow one of the nurses and ask her questions, etc. What are some good questions to ask and what do they usually ask at hospital interviews?