I'll defend this a little bit in the sense that "had no relation to the job function" is just kind of unavoidable in interviews, or at least hard to avoid without paying major costs. The only way to have an interview that even comes close to reflecting real work is a pretty long take-home, and there are good arguments for not doing those (not least that most candidates really don't want to).
But yeah, the entangling of algorithms questions and coding questions is unfortunate. They're just separate skills. Some people are excellent coders who think "big-O" means something obscene, and some people are a walking discrete math textbook who can't problem-solve to save their lives. Triplebyte split (and Otherbranch splits) the two into separate sections, with coding problems explicitly designed NOT to require any of the common textbook algorithms. It's sometimes a little darkly funny how quickly a particular sort of candidate folds when asked to do something novel that steps outside what they've been able to memorize.
But yeah, the entangling of algorithms questions and coding questions is unfortunate. They're just separate skills. Some people are excellent coders who think "big-O" means something obscene, and some people are a walking discrete math textbook who can't problem-solve to save their lives. Triplebyte split (and Otherbranch splits) the two into separate sections, with coding problems explicitly designed NOT to require any of the common textbook algorithms. It's sometimes a little darkly funny how quickly a particular sort of candidate folds when asked to do something novel that steps outside what they've been able to memorize.