[adamkf]

Since you bring it up, I think studying questions that a company has been known to ask in the past is somewhat in poor taste, especially if the candidate gives the impression that this is the first time they've seen the question. Usually, when I've done interviews, I'll try to throw a wrench into the question and see how the candidate reacts if I suspect they've seen the question before.

Though in both cases, I think it's on the question asker (either teacher or interviewer) to make sure that questions change up frequently enough and aren't easy to study without having genuine understanding.

[Aeolun]

When interview questions are generally of the ‘have I seen this question before’ kind, it’s hardly cheating to try and memorize as many of them as possible.

It just means the method of interviewing is flawed.