I applied through university. I interviewed at Jane Street
Interview
One puzzle followed by "do you have any questions". I did not see the puzzle online before. The interviewer seemed to be nice, but I was too nervous to answer well.
Interview questions [1]
Question 1
One hundred doors, one dollar after each door. Roll a one-hundred dice for one hundred times. You can take the dollar after the door whose number is rolled out. What's the expectation? Why?
Heard Jane Street has exciting internships for female students so I decided to apply. Filled out online application. Received a response for online assessment. The assessment was quite difficult for me. The interview was even harder. Lots of technical questions.
Interview questions [1]
Question 1
Two players, flipping a coin until one player wins. A wins if the roll ends with HHT. B wins if the roll ends with HTT. What are the odds B wins the game.
very hard and demanding. they are very selective. they like puzzles and pushing you to think out loud. interviewers are nice though. would possible try in the future. maybe. will see
Asked to play a game and probability - the probability questions were easy, and the game had very little math. It was over an hour, closer to 1 hour 30 minutes. Over zoom