I applied through college or university. The process took 1 day. I interviewed at Bloomberg (New York, NY) in Oct 2014
Interview
The first part was an on campus interview. This had easy data structure/algorithm questions. After this, I was flown to the NYC office for an all day interview. I went through two rounds, but I'm assuming there are more before receiving an offer.
Interview questions [1]
Question 1
They asked me in depth questions about a project on my resume in the first round. In the second round they asked a geometry problem about finding the area of an arbitrary shape in a 2D plane (or at least something related).