Jane Street Business Development Analyst interview questions

Phone interview with 2 big questions, interviewer would introduce himself/herself first then ask if you had a pen and paper to write with. The interview would then begin with the first question. Interviewer would provide small prompts but the interview is mostly one-sided.

Started with an online case study that required excel followed by phone interview with two people that covered a typical estimation problem and then two probability problems (roll-a-dice, etc.). Didn't go past phone interview.