You will talk with the founder directly, because if you get admitted you two will work closely for 3 months and this is a big investment.
You will go through a 30 min get-to-know-each-other session, including some technical questions if needed.
Don't worry - this isn't a full-blown technical interview - no live coding or impossible to answer questions! Ideally you will learn something during the interview, and be energized about the journey ahead of you.
Go ahead and book a slot now