Interview- New Grad PD

I am a new grad and have an interview with a homecare agency that does private duty cases. What types of questions should I ask to determine how the company treats its employees (particularly, RNs)? What kinds of things should a private duty nurse be aware of before deciding to go with a certain agency? I guess what I'm asking is, what are specific questions I can ask at the interview to determine if I'll have adequate support-- esp. as a new grad. ??

Thanks!