The interview consisted of two technical 45 minute phone calls, which is the same for every applying intern. The first interviewer was difficult to understand (talked softly, had an accent), but I did much better in this interview than the second. First he asked a general question about my computer science studies, then two big coding questions. I did not completely finish them but walked him through how I would finish them since I was pressed for time. The second interviewer was friendlier and easy to understand, but asked a very difficult coding question that took me the whole interview. He had to talk me through most of the problem and the code still wasn't completely done at the end. There is no specific way to prepare for these interviews, as anything relevant you learned in the past few years can be asked. I'd suggest reviewing any data structures or algorithms you have had a hard time with in the past. Also, come prepared with questions to ask the interviewer at the end.