There was a few phone interviews that involved probability and game theory questions. Before a final round interview in hong kong. Interviewers are very nice best to describe your thought process
Interview questions [1]
Question 1
They asked me probability and gamer theory questions.
I applied online. The process took 3 months. I interviewed at Jane Street in Nov 2019
Interview
I went through two interviews for Jane Street's Quantitative Trader Internship. The interviewers were nice and I was allowed to use a piece of paper and pen if need be.
Interview questions [1]
Question 1
Two players play a game of coin toss with one coin, where one wins if there's a sequence of HTH and the other if there's a sequence of HHT (H: head, T: tails). Is the game fair? If not, who has the advantage?
I applied in-person. I interviewed at Jane Street (Sydney) in May 2026
Interview
Attended first year program, got interview directly from program. Then had two technical rounds, rejected after 2nd round. Both around 45 mins long. First one definitely quite easy compared to 2nd one. Interviewers very nice and considerate and want to see you succeed which definitely made the experience way better.
Interview questions [1]
Question 1
For first round I got 2 questions, one based on a game against a single opponent involving a pair of die. The other question was more a solo game, involved some EVs / playing optimally when playing this game ie asked me how would you play this game, if he game changes slightly by now having X and Y, what is the EV of this new game.
Interviewed for two rounds. I passed the first round last year so was able to continue immediately with the second this year. Probability/game theory questions. The interviewers are friendly and helpful.
Interview questions [1]
Question 1
If you roll a dice and receive that amount in dollars but have the option of rerolling up to two times, how much would you like to pay to play this game?