It was fairly straightforward, with candidates having to present a technical topic to the interviewer and having to answer questions afterwards. Overall, the interview was pretty stress-free and enjoyable. This was an internship from my college, so it might not be applicable for other places.

Interview process lasted for two months. Phone interview came first, and was centered around delving into background and reasons for pursuing the internship. Lasted about 15 mins tops. Few weeks went by and another phone call was scheduled to remind them of my interest. A few weeks went by and after another reminder, an interview with the project lead was scheduled to gauge technical competency. Stressful due to the uncertainty and long time frame, but it was extremely rewarding in the end.