UBS Data Scientist interview questions

I managed to go thru 2 rounds of Interview with UBS and HR scheduled both the calls perfectly. In the first round I met a genuine guy who was patient enough and was assessing me on my work and experience and hearing me patiently. The second one was with a guy from New York and I can swear that was my worst ever interview experience. I was intimidated and insulted in that call but I was still patient. He wont let me talk and interrupt me in every line. I can assure that guy doesnt have any knowledge on Data Science and Python Language. He was asking me definitions of some random machine learning terms(hope he doesnt know ML and Deep learning are vast subjects and no one can have a complete knowledge on that and everyone works on their field of choice like NLP, Image Processing etc.). An interviewer should evaluate a person's experience and not asking definition of this or that. Being a python developer from 8 years this is the most funniest thing I heard from an interviewer- what are different types of generators in Python? I was like that you even know what generators are? I said can you tell me since i dont know types of generators in Python, never heard of it. On that he replied Yield is a generator. I was about to hang up after hearing this. I was still patient and explained him yield just return the next value in iterator and it's like return in any regular function. I'm happy that I didnt make thru that interview round. I dont want to work with someone posing as a Data Scientist when he is not. Thank God.