What's COPPA? What's UUID/idfa/VAST tag? What's confidence interval? What's t-test? What is this SQL query doing? Give me an example that you promised to finish a task by a certain date but you failed to finish it on time.
I went thru a detailed description of the project, and the steps, time they took, how I measured success, etc. They asked a lot really good questions to see if I was organized and capable of managing large scale projects.