3 rounds. Pretty chill conversation, some technical and some personal questions. In the first round they gave me a scenario and asked questions related to it. In the second round it was some questions about what I did during my master's. Third round was with the department director, mostly personal questions.

decent questions not trying to delver deep into specialization just trying to figure out whether you can be a employee for longer duration or not and the interviewing panel was also very supportive during the interview