Interview was pretty brief. Had a schedule of meetings with several people in the department which all asked basically the same questions . . . what are you interested in working on, who are you interested in working with, what are your long-term goals, what things do you like to do etc.. Went out to lunch with several other students, think it was basically a free meal for them. They all had typical 'watch out for this professor', I do 'this' for 'that' person. Not terribly insightful or difficult overall.

I was offered a skype interview once my application was selected. The skype interview was basic. They had questions regarding my prior research experiences. Then I was explained about the project and what is expected from me. It was a very casual interview and an easy one.