Ask a lot of questions and just kind of mine it for what is most likely compatible with you. Make sure you don't give any indication of how you think they should answer the questions.
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http://www.leadershipinstitute.org/EPS/careers.cfm?id=6
Most Asked Interview Questions
1. What do you expect to gain from an internship with our office/organization?
2. What do you know about our office/organization?
3. Why do you want to work for our office/organization?
4. What extracurricular offices have you held? What did you learn from them?
The Dirty Dozen
Twelve Questions Which Can Kill You If You Are Not Prepared
1. What can you tell me about yourself?
2. Why should I hire you?
3. What are your strengths?
4. What are your weaknesses?
5. What are your career goals?
6. How does this job fit into your career goals?
7. What do you know about our office?
8. Which issue is most important to you?
9. What is your favorite book? Why?
10. What was your favorite class in High School? College?
11. Do have any questions for me?
Ask them if they were president how they would improve the health care of this country. You might want to mask it a little bit better than that, but it is an appropriate question.