Had to read 2 whitepapers on neural networks and write up an analysis/critique on them. Never discussed the papers or my write-up. Interview was casual. There were a couple awkward moments where I clearly didn't know what they were asking. But the team members seemed to value honestly. If you don't know something just be honest about it. By the end, they were joking with me and it felt pretty easy-going. I'd feel comfortable working with these team members.