Me postulé en línea. El proceso tomó 2 semanas. Acudí a una entrevista en Jane Street
Entrevista
First interview was about my resume and the usual personality stuff
Second interview was some brain teasers (5 qns)
A unit cube is dipped in green paint. The painted cube is then cut 3x3x3 smaller cubes. What is the probability of you randomly picking a cube and then rolling non-green on the outside?
i think the ans is : P(pick cube with only 1 side painted)*P(landing on green face) + P(pick the centre most cube)*P(landing on any face) = 6/27*1/6 + 1/27
Preguntas de entrevista [1]
Pregunta 1
If 1st Jan 2015 was on a Monday, which day would it be on 1st Jan 2025?
Me postulé en línea. Acudí a una entrevista en Jane Street
Entrevista
The interviewer was very informative. The questions appeared basic initially, but they required deeper reasoning, strong fundamental knowledge, and careful problem-solving instead of simple, straightforward answers throughout the interview process.
The process was structured and intellectually challenging. It typically involves an initial recruiter screen, followed by probability, mental math, expected value, and game-style problem-solving interviews. Interviewers focus more on reasoning, communication, and adapting to feedback than memorized answers.
Preguntas de entrevista [1]
Pregunta 1
You have two opaque boxes in front of you. At each turn, you may choose one of two actions:
Place: put one coin into one of the two boxes, chosen uniformly at random.
Take: choose one of the two boxes uniformly at random, take all the coins inside, and empty that box.
You play for exactly 100 turns. Your goal is to maximize the expected number of coins you collect.
What is your optimal strategy?
Several phone calls to go to the final round. The phone calls consists of mathematical, probabilistic brain teasers which was not that hard for a mathematics major. Final round was to harsh for me, strong mentality is required