I've had an experience where the interviewer tried to stop me from doing a DFS on a graph. Then they tried to tell me that's not how DFS is done. I am a pretty chill and curious guy, so I turned this into a discussion. At the end, I go like 'so my initial approach was correct', he goes like 'yeah, I guess it was' then I never heard from them again. I still think about that interview from time to time.
