Zhihu Algorithm Engineer interview questions

The interviewer is very hostile. His very first question was to slander one of my previous employer, which was a competitor to zhihu in some area. This interviewer's knowledge of algorithm and mathematics was not solid as well. When I gave a well known machine learning conclusion about Bayesian algorithm, he just didn't know it at all. And when I were explaining the formula, the guy was just being arrogant. It was such a waste of time.