The recruiter misunderstood the answers and or he is not qualified to ask those questions. Usually when you ask someone something that is not literal as in "what is 1+1?" You can't expect them to be literal. Questions like: Why Quicksort is the best sorting method? Guy gave very good answer showing that he has perspective and he is able to make a valid argument. The recruiter on the other hand just read the paper and completely disregarded the fact that the person he is trying to recruit is a valid candidate.

Also at the end the recruiters attitude aweful. Like what is that, he was reading answers from a paper, couldn't make valid arguments back to the candidate and at the end turns and says to the candidate "sorry my paper says you don't know this and that, and goodbye?"