Bloomberg Sr Software Engineer interview questions

Applied online. After ~3 weeks received request for phone screen. Phone screen lasted ~1hr and was all trivia on C language, with questions on keywords, and analyzing a few lines of code. Interviewer did not show any emotion or give any indications of whether or not they were satisfied with a given answer. Asked some Unix questions and trivia on threads, parallel processing. Ended with some open ended questions on data structures, like 'are you familiar with any data structures?' I mentioned linear structures (array, LL, etc), hash tables, and trees to give a couple examples. Asked questions like 'what is notable about XX data structure,' 'what is important when hashing keys', 'how are trees balanced.' I had a lot of questions and the interviewer said 'I can give you about 2 minutes.' He sounded like a robot, so I asked if he enjoyed the job and he said it's fast paced and you will roll out features often.