Round 1 and 2: 2 questions each round. All were seen under LC's bloomberg's tag. So I won't disclose what were asked exactly. As long as you practice all those questions you will be fine.

Round 3: HR round and behavioral questions. Why Bloomberg? What are the top 3 things you are looking for in companies?

Round 4: Manager round. Design a system that allow users to retrieve stock info as fast as possible. Most likely I failed to impress the manager at this round. I'm not very good at system design.

Conclusion: Feels like Bloomberg doesn't ask super hard algorithm questions. So I believe a good number of people will have no problems on coding. Then it means you have to be perfect to get an offer. In some sense it seems to be more difficult. I felt good after the interview but still no offer. There's little room for mistakes and imperfection here.