The guy called 20 minutes late and then basically pigeonholed me into consideration for a testing role. I was interviewing for a bunch of development roles at the time, so I had no interest after that. He was also annoyed that I would say "I think the answer is [xyz]". He told me "no, you should say 'you know the answer is this' not 'I think the answer is this'. Basically my interviewer was impolite, called late, and thought he was always correct about everything. Not exactly someone who I'd want to work with. I declined to move forward in the process.