It's funny how people who don't know how

It's funny how people who don't know how to answer the questions assume the questioner is an arrogant racist. Did you not notice that he repeatedly said that candidates who couldn't answer the first couple questions still had potential as engineers, just not architects. There is a difference. Just because you can drive a car and even change the oil doesn't mean you know how to build one. So if your resume claims you're an architect, there's nothing wrong with making you prove it by answering difficult questions. Again - as he pointed out time and again - it's less about the "right" answer and more about the thought process behind it. If you can't handle thinking during an interview, McDonald's is probably hiring...