Bloomberg Software Developer interview questions

First round was phone interview, I was informed by an HR that my interview was going to be at sometime prior a week. It's a bit weird that even though I had answered both questions that were asked, didn't hear back after the interview. it lasted for 1 hour.

I applied through employee referral. I got mail from HR within few weeks to schedule a first technical telephonic interview. During the interview, an interviewer asked me about my background and two technical question. One question was based on algorithms and the second question was about the system design problem. After that, I got an invite for an on-site interview at their New York location. There were two technical interviews, each one hour long. During the first on-site interview, there were two interviewers, and they asked me again system design problem and graph based problem. During the second on-site interview, the interviewer asked a question based on standard data structures.