Assistant Trader Interview Questions

578 assistant trader interview questions shared by candidates

I have a jar filled with 100 pennies. 1 of those pennies has two heads, the others are normal pennies. I randomly choose one penny, flip it seven times, and get seven heads. Am I holding the two-headed penny or a normal penny?
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Assistant Trader

Interviewed at DRW

4.3
Jan 26, 2010

I have a jar filled with 100 pennies. 1 of those pennies has two heads, the others are normal pennies. I randomly choose one penny, flip it seven times, and get seven heads. Am I holding the two-headed penny or a normal penny?

You have 17 coins and I have 16 coins, we flip all coins at the same time. If you have more heads then you win, if we have the same number of heads or if you have less then I win. What's your probability of winning?
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Assistant Trader

Interviewed at Susquehanna International Group

3.8
Mar 28, 2016

You have 17 coins and I have 16 coins, we flip all coins at the same time. If you have more heads then you win, if we have the same number of heads or if you have less then I win. What's your probability of winning?

A company has a value V which is uniformly distributed between 0 and 1. you are planning to place a bid B for the company. If B is smaller than V, then your bid loses and you get nothing; if B is larger than V, you get to purchase the company at price B, and the company will end up being worth 1.5 * V. What price B should you bid to maximize your profit?
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Assistant Trader

Interviewed at Jane Street

4.4
Oct 29, 2014

A company has a value V which is uniformly distributed between 0 and 1. you are planning to place a bid B for the company. If B is smaller than V, then your bid loses and you get nothing; if B is larger than V, you get to purchase the company at price B, and the company will end up being worth 1.5 * V. What price B should you bid to maximize your profit?

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