It was the biased coin question. I instantly turned into a little dummy on the spot. I had no idea what the problem wanted, my brain was racing with confusion: why do they want me to prove a math probability problem in a coding round?
Part one: use the rules of a biased coin to design a fair coin.
Just this one part took me over ten minutes to read, because I had absolutely no idea how you could design fairness. In the end the interviewer couldn't watch any longer and said, don't worry about why, just implement it. Only then did I let my poor little brain off the hook.
Part two was debugging, and I was still stuck in math thinking.
For Anthropic's questions I prepared about 15 of them, coding plus OA, and I felt that covered 95% of what shows up.
Still, I wasn't prepared enough. I had never seen yesterday's phone screen question at all, and I went down a wrong direction. The coding in this question isn't hard anymore; I think the main thing is understanding what the problem is asking.
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