probability questions, dice, etc. not too hard if you have prepared, so do many probability questions beforehand, focusing on expected value, sequential throws, mixed card games and so forth. several rounds with different questions each time
The process began with serveral online tests for maths and logic. They gave a personal interview to get to know the candidate better and evaluate fit for the company/role, then held a technical interview covering maths and logic problems.
We started with a bit of small talk, followed by some probability questions. Ended with some basic algebra questions, Make sure to ask questions if you have any. Good experience, feels like the interviewer was trading.
Difficult interview
Application
I interviewed at Jane Street (Hong Kong)
Interview
Fun and filled with unexpected questions. The questions rely on fast thinking and fast calculations, and sometimes intuition because there is no sufficient time for me to work through the whole problem.