Two Sigma Quantitative Research Associate interview questions

HR phone screen, followed by a coding sample test, followed by a phone conversation with a member of the team interested in me. I didn't know anything about finance, and didn't make it past this phone interview. Interviewer was generally pretty nice and willing to explain the market and the problems that Two Sigma work on.

I got contacted via email by an HR representative. Then I set up a phone call. It was really friendly chat. Then after the phone call, I got a two-hour coding challenge. It was two simple questions however I did not code in C++ for a while so I cannot finish the questions on time.