Comment by grumblestumble

A similar thing happened to me a while back - except it was for a UX-focused front-end development position. When I turned it around and asked the interviewer why it would be a waste of time in nearly every use case to implement linked lists in Javascript, I got nothing, he just moved on to quizzing me about binary trees. This was the point at which I decided that, despite it being an interesting company tackling a great challenge, I just wouldn't be able to come in to work with people like this every day. Catch ya later, second-tier application performance monitoring startup!