I carried out a phone interview with Bloomberg.
The interviewer was very kind, after an initial part of the conversation about my background and my past experiences, let's go to Hackerrank for the technical part. The exercise was a reinterpretation of https://leetcode.com/problems/design-browser-history/, I made some mistakes but in the end I managed to arrive at an optimal solution. The interviewer seemed satisfied, but I still made some mistakes.
Update: Rejected after 3 days