I have gotten solutions which implement custom stores which I have had faith that the candidate could build, but not many. I am not dead set against it, but I w

I have gotten solutions which implement custom stores which I have had faith that the candidate could build, but not many. I am not dead set against it, but I will press for an estimate and a good explanation of it if they want to go down that route. I try to emphasize that I want to know what they would actually do, on the job. Other questions (typically other interviewers) will explore algorithmic stuff, and folks I work with have used this question with that intent -- I use it to see how they think about building systems. Another thing I didn't mention in the blog post is that up front I tell them exactly what I am looking to learn. I am not going on a fishing expedition, or trying to trick anyone. I find that kind of "second guess the interviewer" thing to be asinine, so strive to avoid doing it myself.