EPAM Systems Software Developer interview questions

Interviewer didn't show up for 2 times. I had to reschedule twice. Interviewer had constant background noise, a child was screaming which gave me a lot of anxiety and disrupted my entire thought process. His English was accented and with the noises, I didn't understand him at all sometimes. I panicked a lot because of the environment. He was condescending at times, "Arent you supposed to know that?" "Why didn't you mention that?" "So you dont know it actually?" Sometimes he disappeared and I just waited, finished with my answer. No hints, just comments afterwards. Questions were fairly easy, but I lost motivation halfway and couldn't care to give my best.