Had a phone call interview after I attended their 2 week masterclass series. I was rejected based on a lack of comprehensive understanding of what Bloomberg employees do. The follow up to this interview was a direct assessment centre, after which there was a final round interview with a partner/manager

Hirevue, Superday, In person. Hirevue was pretty standard and the superday was hard, but they give you all of the info you need to prepare. I prepared well for everything besides the sales role play, and that's where I messed up. Everything else is exactly how they describe it.