Parts Avatar interview questions

First round is offline coding round, simple in logic but much to code. Second was an hangout interview one on one with a lady, she was nice and explained questions very well. Last one was with CTO hangout - very poor person in nature, he just asked one question and started shouting and yelling and giving warnings. He was in bad mood i think, or might be the case that his behavior is that way. I think interview is the process to bring out the best in interviewee