I first did a written test on campus, with math calculation (plus minus multiply and division), finding the rules behind a sequence, and basic market questions. Then a few weeks later, I received a call from the HR, and had the first telephone interview. Another week later, received another call from one of their traders, and had another round of phone interview. Both interviews are behavioral plus a little test on market knowledge, such as what is a market maker, what do market makers do. I was not invited to Chicago for the final round of interview.