Snap Software Developer interview questions

I took two phone interviews. I know some people may only take one interview. The first interviewer was really nice and helpful. The second interviewer was awful. For two sum problem, I use the variable name index, but the interviewer was not happy about that, and changed it to result. Horrible!

First Interviewer: It seems that he really did not want to be there. I did not hear him when he said, "Are you familiar with diff?" (I heard "liff") When I said "no," he immediately snapped at me in surprise as if I was a moron. As I was writing on the board, he did not allow me to take notes on what he was saying because we "had no time." As a result, I was lost with his instructions (it did not help that he had an accent). As I tried to add simple comments to clarify arguments on my own code, he also refused to let me write comments, even as a clarifier, and snapped at me when I did not get my run times right. In the end, he asked me if I had any questions, and when I did ask a question he said, "oh actually I have to go, I can't answer your questions, but someone else will." Very very unprofessional. Second Interviewer: Really awesome guy! The question was challenging and he allowed me to think on my own and I really felt like I was not being rushed and was able to reason through the problem.