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They're really not. It becomes a cat and mouse game where the interviewers know which pool of questions people are studying so they try to invent new ones to prevent people just memorizing the answers. The questions thus end up becoming more and more obscure.

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yeah but they're variations on the same stuff. it just allows gaming of the whole process where if you solve enough of those types of questions, you have a better chance of getting in.

Some are variations but some are just more obscure. They definitely get into very specific greedy algoss or things like prim's/kriskals/tarjans. which can be pretty much hit or miss based on if you've seen it or not

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