I first had one on-campus interview with 2 engineers, who both asked easy questions but had a lot of interesting followup questions about runtime and modifications. Bloomberg cares a lot about these optimizations because even small rounding errors or loss or precision could mean a lot of money in the financial market. I overlooked that the last time I applied for for a summer internship, and that's probably why I got rejected last time. Second and final round was onsite - I had one interview with engineers, who were both super awkward and I definitely thought I failed it. Asked random question about treemaps which I botched...but they were interested in my experience with scalability and distributed systems. Next interview was with HR who just asked me about my personal career goals. Last interview was with a manager who was super chill - we mostly talked about my projects and goals, but then he asked me a brain-teaser like question that I got mostly right. To be honest, I'm surprised I got an offer - maybe the two awkward interviewers liked me more than I thought?