Trader Assistant Interview Questions

578 trader assistant interview questions shared by candidates

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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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?

First part,we are playing Russian roulette, with a standard 6-chamber revolver. I put two bullets in adjacent chambers, spin, point the gun at my head, and pull the trigger. Click. I'm still alive. It's now your turn, and I hand the gun to you, and give you two choices. Would you rather, assuming you want to live, a) Re-spin, aim at your own head and pull the trigger. b) Do not spin, aim at your own head, and pull the trigger Second part, given I spun - what is the probability of me dying this time?
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Assistant Trader

Interviewed at Susquehanna International Group

3.8
Nov 5, 2015

First part,we are playing Russian roulette, with a standard 6-chamber revolver. I put two bullets in adjacent chambers, spin, point the gun at my head, and pull the trigger. Click. I'm still alive. It's now your turn, and I hand the gun to you, and give you two choices. Would you rather, assuming you want to live, a) Re-spin, aim at your own head and pull the trigger. b) Do not spin, aim at your own head, and pull the trigger Second part, given I spun - what is the probability of me dying this time?

I did initially misunderstand this question and had to be helped along, but it is fairly difficult to do on the fly anyway: "We're playing a game with an unbiased 30-sided die. Before we roll, we both pick (distinct) numbers between 1 and 30, and then we roll the die. If the number that appears is closer to the number I picked, you pay me, in dollars, the number on the die; if it is closer to the number you picked, I pay you, in dollars, the number on the die; if it is equidistant we do nothing. What's the optimal strategy - do you go first or second, and how do you pick your number? What's your expectation?"
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Assistant Trader

Interviewed at Jane Street

4.4
Mar 25, 2014

I did initially misunderstand this question and had to be helped along, but it is fairly difficult to do on the fly anyway: "We're playing a game with an unbiased 30-sided die. Before we roll, we both pick (distinct) numbers between 1 and 30, and then we roll the die. If the number that appears is closer to the number I picked, you pay me, in dollars, the number on the die; if it is closer to the number you picked, I pay you, in dollars, the number on the die; if it is equidistant we do nothing. What's the optimal strategy - do you go first or second, and how do you pick your number? What's your expectation?"

The interview started and I was told to not use and pencil or paper. They asked me some squaring questions and some subtraction with large numbers. I was also asked how much I would pay to play a game where I get heads if I win a dollar, and how much I would be willing to pay if I was able to re-flip up to two more times.
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Assistant Trader Internship

Interviewed at Jane Street

4.4
Feb 19, 2014

The interview started and I was told to not use and pencil or paper. They asked me some squaring questions and some subtraction with large numbers. I was also asked how much I would pay to play a game where I get heads if I win a dollar, and how much I would be willing to pay if I was able to re-flip up to two more times.

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