I'm a first-year graduate student.
I had three interviews with Bloomberg recently. During my interviews, I was able to solve all of the issues. It went well, and I was able to test corner cases, as well as answer questions about time and space complexity. They were in agreement with me.
They sent me a rejection notice today, claiming that I don't comprehend data structures and don't code in java very well. I mean, I solved two questions in 30 minutes(my behavor question is around 15 minutes) and typed quickly. I'm not sure why! I even begin to have doubts about myself.