One interview that was 45 minutes that covered technical knowledge as well as standard behavioral questions. Technical questions were simple research based and the behavioral questions were not particularly hard.

The interview process was very relaxed. I only got to the first round of interviews but my interviewer was very nice and understanding. It was only a 30 minute interview, they asked my about my prior experience as well as a few behavioral questions. They gave me time to ask them questions in the end which was very insightful