Typically interview questions are asking for you to give an example of when some situation happend and how you handled it. Ex. "Give me an example of a time where you had a family/patient/customer that was really upset, and what did you do about it?" And many other similar questions. They won't be questions testing your clinical knowledge, they will be questions to help them decide how well you are going to fit in on the unit. Then again, you did say this was for an internship, so they could be a little different. But these are the questions most people are asking when looking to hire someone.