I was invited for an internship interview, and did it the following day. Other departments' internships had started, so I expected the hiring process to move quickly. It took 6 weeks to hear back from HR. The interview was casual, and the interviewer was kind and friendly.

It was a quick interview process and was not too difficult, only included one round to make a decision for the position. Asked to elaborate on parts of resume and asked about specific books we are reading and what we are interested in working on.