The interviewer already had an opinion of me before I met him, which objectively was inaccurate. He gave those same opinions as the reason for not pursuing my application - I subsequently found out thay they hired a person they already had contact with, so the interview process was really just a check to make sure their identified candidate was reasonable.

Interview process is completely dependent on the hiring manager as there is no formal hiring process followed across the company nor any specific questions etc... My process included a single day in which I met with two different people after an initial screening over the phone to vet mutual interest.