Jane Street General Intern Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 271 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Jane Street.
Jane Street
Intern
Intern Difficult Neutral experience No offer 3 rounds
Interview process
Recruiter call Take home Technical screen
Interview formats
Technical Coding
Heard Jane Street has cool internships for female students so I decided to apply. Filled out the online application. Got a response for an online assessment. The assessment was super hard for me. The interview was even harder. Lots of technical questions.
Confirmed questions1 question
- Given two players flipping a coin until someone wins, where Player A wins with HHT and Player B wins with HTT, what are the chances of Player B winning?
Jane Street
Intern
Intern Difficult Positive experience Accept offer 3 rounds
Interview process
Phone screen Onsite Recruiter call
Interview formats
Technical Behavioral
Had 2 phone interviews, then an onsite. All of them were technical except for the last one, which was behavioral. The questions covered a range from basic market making to Excel games and some card games that they made themselves.
Confirmed questions4 questions
- Can you tell me about some basic probability concepts?
- How do you calculate Expected Value (EV)?
- Are you familiar with basic probability concepts?
Jane Street
Quant Intern
Intern Difficult Positive experience No offer 2 rounds
Interview process
Technical screen Technical screen
Interview formats
Technical Coding
The interview process was brief, with only two rounds, and focused entirely on problem-solving and brainteaser questions. There were very few, if any, behavioral questions. The interviewer was pleasant but immediately presented the brainteaser problems. They were quick to inform me about moving to the next round but took their time responding if it was a rejection.
Confirmed questions1 question
- Given 3 buckets, each with a capacity of one, and a guarantee that each thrown ball will hit a bucket (bouncing out if full), calculate the expected gain with 2 balls, where each successful ball in the bucket scores +1 and each bounced-out ball scores -1.
Jane Street General Intern Interview Questions
Quoted word for word from Jane Street interview reports.
“If two teams play a best-of-7 series and each has a 50% chance to win any given round, what is the probability that the series will go all the way to the 7th round?”
Read reports →“There are six cups and six saucers, forming three pairs based on pattern: two red, two white, and two with stars. If cups are randomly placed on saucers (one cup per saucer), what's the probability that no cup matches its saucer's pattern?”
Read reports →“Given that there's a p% probability of rain on Saturday and a q% probability of rain on Sunday, what are the maximum and minimum possible probabilities for it raining on both days?”
Read reports →“Consider a 2x1x1 brick. If the distance between two points is defined as the smallest length of any path between them on the brick, what's the largest possible distance between any two points on it?”
Read reports →“Given a 12-sided die and a 20-sided die, where each player gets two rolls and can choose to stop on either roll, with the higher number winning (ties go to the 12-sided die player), what is the probability the 20-sided die player wins?”
Read report →“Given a tricycle, 1000 miles to travel, and two spare tires, what's the minimum number of stops needed to ensure all tires wear out equally by the end of the journey?”
Read report →“For two dice, a 10-sided and a 6-sided one, you must guess a number from 2 to 16. If the total from rolling both dice matches your guess, you are awarded dollars equal to that number. Which number should you pick to get the most money?”
Read report →“Given a treasure chest with a price uniformly distributed between £0 and £1000, what bid should you make to maximize profit if you can sell the chest for 1.5 times its price?”
Read report →“A cube, white inside, is painted blue on the outside and then cut into 27 smaller cubes (thirds along each dimension). If I randomly pick a cube and it lands with one side down, and all visible sides are white, what's the probability the bottom side is blue?”
Read report →Formats, difficulty and experience
Across all 271 Jane Street interview reports.