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My favorite is the ONANDA interview: the first time they ask about cycles in linked list and he tanks completely... then the next year he tries again, they ask the exact same question and he aces it.

So the trick to a good interview is... know the questions in advance so you can google them beforehand?

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I'd say that this is kinda okay - if they'd asked him the same question, and he hadn't improved, it would've shown that he doesn't have much in the way of curiosity / doesn't want to improve.

But they've just wasted 1 year. They should have tried to figure out if he has the required curiosity in the first interview itself.

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