I was thankfully asked (in the interview, not just assuming I’d been asked the Q before).

Question was: write code to determine if the stack grows up or down. I’d been writing computer games for several years and smashed it (after telling the interviewer that it would be necessarily technically rely on undefined behavior) and the interviewer somewhat dismissively said “you should have told me someone else asked you this question” “What are you talking about? This is just an easy question.”