I had two phone interviews as a Freshman undergraduate applicant. The first interview was about 15 minutes and was mostly a simple fact check about resume information and if I wanted to make any changes. Also asked about what kinds of positions I would be interested in. The second interview was more in depth about an IT internship and my interest. Questions i was asked:
Tell me about yourself.
What do you know about Information Technology?
Tell me about your leadership positions.
Tell me about what your involved in at school.
Overall, this interview only took about half an hour and was mostly laid back, as with the first.