DoorDash Data Scientist / Senior Data Scientist interview questions

The interview process was first a recruiter screen, then two screening interviews with SQL and a case study, then 2 case studies, one hiring manager interview, and 1 cross-functional partner interview. These interviews are similar to what I would expect for data scientist interviews, but they aren't layups. I expected to be ready after acing the screens + (in my opinion) one of the case studies. But then in one of them they were looking for me to use some concepts I wasn't familiar with, so I bombed it and spent most of the time jumping around to adjacent topics that were similar but evidently not as good. They're pretty quick with the interview process, and I felt they were professional. I just wish it had gone better