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    This means that you can’t compare progress. If someone writing Python got through 80% of the question and someone writing C got through 70% you can’t conclude that the Python programmer was better than the C programmer. They were doing different things.

    They were solving the same business problem. If they’ve dedicated themselves to a tool that’s inefficient (or at best ill-suited to your line of business), surely it’s entirely correct to mark them down for that. (This presupposes that you have found a problem well-aligned with what’s typical for your business, and that this part is a work sample rather than an intelligence test)