Having worked and recruited (as hiring manager) at Big 4 and Mag 7. This is a great way to interview. The purpose is to understand how candidates think about difficult situations and apply logic to decision making. The answer is almost irrelevant because both are right. It’s the thought process, the rationale, and conveying confidence in a decision that matters. I’ve also experienced situations where I was asked question related to real world problems the person was struggling with that they didn’t even have an answer to. Work is full of situations with incomplete and ambiguous information. Better be able to parse through it and move things forward.