There were two rounds. One on campus interview and one Superday at the office in NYC. The first was two 30 minute interviews and the superday was two 45 minute interviews. Each of the interviews required me to answer both behavioral and hypothetical case questions. The case questions were very vague and really served to show how I thought not necessarily the quality of my answers. The best way to prepare for the interview is to know your resume front and back and how each experience would make you a good candidate for the job youre going out for. Also, I would do a lot of research about the company. Know how they use big data, the closed loop system, and the purpose of coffee chats. I would also know a few programs they do outside of their core business model like their 1:1 model and small business saturdays. The more you show you know about the company the better you will look!