Bloomberg Senior Software Engineer interview questions

Applied through online and got a call from recruiter. Got scheduled for a first round interviewer. Felt like interviewer was not well prepared. When I was asking more clarity on the question, he was like "don't complicate the things. " He initially asked me my approach and said my approach. He said about its time complexity and asked if I can enhance it. Time complexity needs to be done in air and we need enhance it by thinking in the air. Somehow started the coding, he was continuously questioning my approach without even completing my code completely. Not sure how he was expecting a optimal solution without brute-force approach. After the interview I felt like to think twice if offered this position.

The interview was for 1 hr mostly technical. The interviewer asked basic python questions. Then a hackerrank problem to solve, it was a medium recursion problem (replace wildcards in a binary string). Second problem was gossip algorithm which I had no clue. Ran out of time.