First 2 rounds were by phone. Next they called me for a personal interview for technical round. Questions in face to face was mostly about subject fundamentals and related to project and publications if any.

I applied from the company portal. Got a call from HR to schedule an interview and got it scheduled for the next day itself. This was the first round and there were two managers in the Panel. The interview went really well. Questions were mainly based on the prev. experience (which is expected) and nothing out of the blue. After clearing the first round the second round was scheduled with US counterparts which also went well. Again questions are based on the prev. experience and I felt some part of it was also behavioral. Overall an amazing and a smooth interview experience