Bloomberg Senior Software Engineer interview questions

I applied online using the Bloomberg official website. After a few days I have received an invitation for a 60 minutes pair programming interview with one of the Software Developers of Bloomberg.

Had one round HR interview, and one round hackerrank online interview. Rejected after the hackerrank session. While interestingly that I solved the given problem without any issue (bug-free with various test cases) within accepted time complexity. I heard people who are not able to solve two problems will be rejected. BUT I WAS NOT GIVEN THE SECOND PROBLEM! There is still a lot of time left and I was never given the second problem. The interviewer asked me to write a lot of more test cases to waste time (while I know my solution is definitely bug-free). And when there is 20 minutes left he asked if I have any questions so that the last 20 minutes was spent in chatting :) If you don't want to hire people, don't post JD okay? If you have any other concern should at least provide feekback earlier. At least I don't feel I did anything wrong for the technical round but was still rejected.