You do a mock help ticket and a mock admissions interview. The point is not to find all the bugs, but to see how you are at helping/guiding a student/candidate.
I applied in-person. The process took 1+ week. I interviewed at Fullstack Academy (Chicago, IL) in Oct 2019
Interview
Asked some questions based on the curriculum we studied while as students. Interview conducted in small room off to the side. Had behavioral follow up later. Learned about failure/success a few weeks thereafter.
Interview questions [1]
Question 1
How did you think the technical portion of the interview went?