[sl1ck731]

I think the issue is the filter is based on the specific algorithms and not that problem solving ability.

There seems to be more emphasis on "the candidate knew to use bubble sort" or something stupid like that instead of "I observed this candidate reason through the problem and I don't really care that they didn't know a canned algorithm".

[carlmr]

I think a big point people miss is that you need intuition which algorithm fits where. You don't need the details of how it works, but if you have a good idea how it works you usually have a better intuition.

It's a bad proxy, but better than no proxy in my opinion.

[ehsankia]

No, that's what you assume they are looking at. You're assuming they only look at whether you properly memorized bubble sort, but in reality good interviewers don't care if you don't even finish the problem or find the answer, they are looking at how you approach the problem and your problem solving skills.

You often need strange problems to really get to see people's problem solving, which is why they're often not things you see in real life, but again, the goal isn't to see if people know how to do the strange thing, it's to see how they approach a novel problem from scratch. Aka problem solving skills.