It was bad timing on my part and while I knew most of the concepts involved I was hazy on a few of them which I could have easily resolved in another situation. I want to mention that the last interviewer was extremely rude , interrupting and cutting me off mid way through my response indicative of an intense almost personal dislike which is very perplexing since I never knew the guy. Towards the end of the interview, during a conversation gap, he quite obviously but very delicately called me a profanity. I was shocked and wanted to end the interview which fortunately was going to end anyways.