I spoke to both of my supervisors via Skype, discussed the research project and the potential work before meeting them in person at a conference. I was then given a tour of their lab facilities via Skype before submitting an official application to the university. I was given an 'unofficial' offer prior to submitting my official application.

In a zoom meeting. They ask me some questions and share some details about this position. And also some tech question and coding questions. No much to say, just like interview in other institutions.