From retail to finance to medicine, every industry needs interns to provide additional support and assistance. Interview questions will vary greatly depending on the industry and role you are looking for. Expect to answer questions about how you work on teams and provide examples of any relevant work experience. To ace your interview, make sure to research the particular position you are applying for.
One of the hardest questions they asked was "what made me unique". It's a difficult question for some people to answer sometimes, but as long as you supply 2-3 distinguishing factors about yourself it's really not too difficult. The other questions were very basic, asking your interest in the position and why you'd be a good fit.