You basically need to know what your job entitles, in detail, don't let them correct you. You need to know their products and competitors. Latest news article you read about. They will ask about your previous professional experiences, if you got any, and what challenges have you faced there? If you mentionned any programming skills, they will ask you how did you learn them. Why should we hire you? Why are you interested in the Spring insight? then why are you interested in Bloomberg? Practice all these questions and have something in mind.