I once interviewed a coder for an entry-level data entry position (he needed a job and had limited legal options) who, when I explained the bad data he'd been cleaning up, asked me what approaches I'd looked into for preventing the bad data.
I didn't end up hiring him, but did get a chance to brag on him to my boss when we ran into him over lunch, and my boss got him a way better job that's led to him being one of the most valuable new employees at my workplace.
Questions to other coders most definitely do show quality of thinking!
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