Tell me about a time you showed customer obsession.

"Screen plus three loop rounds, all four back to back in one day. Coding problems were standard stuff, nothing exotic. What got me was that every single one had a follow-up that killed my first answer. Bounded the input range on the median problem, pushed hard on edge cases in the editor. If you only have one approach ready you'll stall. What went well: recruiter was clear about the format, no surprises on logistics. Rounds started on time. What didn't: I underestimated how draining four in a day is. By the calculator round I was slower than I should have been on something I've done plenty of times. The behavioral questions were also mixed into the coding rounds instead of getting their own slot, so I was context switching the whole time."