I searched on Bloomberg's website for job opportunities and came across the Financial Sales and Analytics Program, for which I applied in early December, 2010. I received an email within two weeks and we schedueled a phone call for the week before Christmas.
The phone call was straight forward. They asked what I knew about Bloomberg and the competitors as well as the difference between a Stock and a Bond. I received a followup email inviting me to a first round interview and information session with Bloomberg at their London offices.
The information session in London was attended by approximately 8 candidates. We were given a brief intro to the Bloomberg system and asked some complicated questions relating to finance. We then shadowed someone in Analytics for about 15 minutes. Afterwards we toured the facilities and finally each candidate had an interview with two interviewers.
In this first in-person interview, they asked various questions about current events and finance in addition to going over the resume and past experience and trying to find holes and weaknesses.
I came back two days later for a second-round interview. This interview was much more focused on asking detailed finance, sales and current events questions: What is going on in the Ivory Coast and what does that mean for Cocoa prices? What is an option? What is the option pricing formula? What is 1.3 squared? How do you define market share of a company? If on a Bloomberg terminal you list ask for a list of the largest banks by market share and banks in Indonesia are at the top of the list and what you know to be bigger banks are somewhere in the middle, what is going on? (answer: market share denominated in local, not common, currency.)
Each interview process was more or less the same, though they became more detailed in their question as you moved on. The types of questions, however, did not change. At no time was interest taken in the applicant as a human being, but only in your ability to function as an adjunct to the Bloomberg machine. Similarly, no people met in person at Bloomberg were inspiring or interesting in anyway, and in fact the interviewers, as others have mentioned, seemed to be trained to be expressionless, boring and even rude.
Overall I was very unimpressed with Bloomberg.