I applied through university. I interviewed at MIT in Nov 2019
Interview
Phone interview with PI's. 30 minute presentation on a previous project with ~30 minutes of technical question and answering session followed by introduction to existing project. Have seen others also give an hour long seminar at group meetings.
Interview questions [1]
Question 1
What was the key difficulty you had to overcome for this project?
I applied in-person. The process took 5 weeks. I interviewed at MIT (Cambridge, MA) in Jan 2012
Interview
I was asked to visit the lab and give a formal presentation. I had interacted with the group members one on one and went for dinner with a postdoc from the lab