Trainee Trader Interview Questions

11,668 trainee trader interview questions shared by candidates

2 mental math questions, two probability questions. (1) If you have 4 coins, you toss them, what the expectation value of get heads, not you have a chance to redraw four coins one more time, what is your expectation (2) Two team has equal win probability, What is the probability that they go to series 7.
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Assistant Trader

Interviewed at Jane Street

4.4
Jan 21, 2014

2 mental math questions, two probability questions. (1) If you have 4 coins, you toss them, what the expectation value of get heads, not you have a chance to redraw four coins one more time, what is your expectation (2) Two team has equal win probability, What is the probability that they go to series 7.

let's assume you have a sequence of 36 integers consisting of just 1's and 0's (i.e. 01010101..., 10000100... ). Can you construct a sequence such that every subsequence of length 5 is unique? Let's assume that you start with 00000. How would you construct it? (For instance, if you start with 00000100001..., then it's not valid since you have two subsequences (00001, 00001) of length 5 that are identical).
avatar

Assistant Trader

Interviewed at Jane Street

4.4
Nov 14, 2013

let's assume you have a sequence of 36 integers consisting of just 1's and 0's (i.e. 01010101..., 10000100... ). Can you construct a sequence such that every subsequence of length 5 is unique? Let's assume that you start with 00000. How would you construct it? (For instance, if you start with 00000100001..., then it's not valid since you have two subsequences (00001, 00001) of length 5 that are identical).

Have a tricycle. Will travel on it for 1000 miles. Have two spare tyres with you (hence 5 in total). a) If you want each of them to be worn the same by the end of the journey, how much will each of the tyres travel on the ground. b) What is the minimum number of stops you have to make in order to achieve this.
avatar

Assistant Trader

Interviewed at Jane Street

4.4
Apr 29, 2013

Have a tricycle. Will travel on it for 1000 miles. Have two spare tyres with you (hence 5 in total). a) If you want each of them to be worn the same by the end of the journey, how much will each of the tyres travel on the ground. b) What is the minimum number of stops you have to make in order to achieve this.

You have a lottery ticket with 10 slots. Behind each slot there's a equally distributed number between 0 and 1. Your payout is the maximum number between any of these slots. How much are you prepared to pay for the lottery ticket?
avatar

Assistant Trader

Interviewed at Jane Street

4.4
Jan 30, 2013

You have a lottery ticket with 10 slots. Behind each slot there's a equally distributed number between 0 and 1. Your payout is the maximum number between any of these slots. How much are you prepared to pay for the lottery ticket?

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