I had a phone screening call from a recruiter, they asked some standard probability questions, bayes rule, and expected value about dices. Overall experience was pretty good. Make sure you prepare your probability
Interview questions [1]
Question 1
Expected value, if throwing a dice, 2 dices and 3 dices with option to reroll.
There were 4 rounds of interviews. The first 3 were on the phone. The first one was mental maths. The second and the third interview involved more complicated problems. The last interview was in the London office and it was focused on market making and mathematical problems. Everybody was friendly and it was a nice experience.
Interview questions [1]
Question 1
There are 100 seats on a train that is fully booked. The first passenger is blind and takes a seat at random. Whenever another person gets on the train they take their seat if it's free. If it is not they choose one of the empty seats at random. What is the probability that the last passenger sits in their assigned seat?
I applied online. I interviewed at Jane Street in Nov 2022
Interview
Very smooth. Around 30mins first round 1hr for the second round. First round consisted of easier probability based questions. Second round was similar but harder and longer questions. The interview process if approached in a calm composed manner should be easier to analyse
multiple phone interviews and a full-day Zoom interview. Interviews got longer and longer over time, but every person was very kind and helpful with hints when I got stuck. The questions get harder as the rounds progress and generally don't have a closed form answer in the later rounds
Interview questions [1]
Question 1
they describe the rules of a game and ask if you want to play it based on your expected earnings