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Junior Trader Interview Questions

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(3rd Round) You are given a deck of cards with numbers 1, 2, ..., 100 and 2 boxes. Flip a fair coin 100 times, place the respective card in the left box if H, right box if T. Find the expected minimum card in the box with card 100.
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Trader Intern

Interviewed at Jane Street

4.4★
Oct 31, 2018

(3rd Round) You are given a deck of cards with numbers 1, 2, ..., 100 and 2 boxes. Flip a fair coin 100 times, place the respective card in the left box if H, right box if T. Find the expected minimum card in the box with card 100.

I own a car worth an amount between 0 and 1000 dollars. You can make a single bid on this car. If you bid higher than the value of the car, you pay that much and get the car. If you bid lower than the value, you don't get the car. 1)how much do you bid 2)how much do you stand to lose should you get the car (or something like this) 3) you have a mechanic who can increase the value of the car to a constant multiple of the cars current value. How much should this constant be in order to make bidding worthwhile...
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Assistant Trader

Interviewed at Jane Street

4.4★
Nov 26, 2014

I own a car worth an amount between 0 and 1000 dollars. You can make a single bid on this car. If you bid higher than the value of the car, you pay that much and get the car. If you bid lower than the value, you don't get the car. 1)how much do you bid 2)how much do you stand to lose should you get the car (or something like this) 3) you have a mechanic who can increase the value of the car to a constant multiple of the cars current value. How much should this constant be in order to make bidding worthwhile...

Suppose two players are playing a game. The first player chose an integer between 1-30. The second player picks a different one. After that, a random integer (x) between 1-30 will be generated. The player whose number is closer to x get paid x dollars. Q: Would you go first or second? What number should you pick?
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Summer Trader Internships

Interviewed at Jane Street

4.4★
Apr 10, 2017

Suppose two players are playing a game. The first player chose an integer between 1-30. The second player picks a different one. After that, a random integer (x) between 1-30 will be generated. The player whose number is closer to x get paid x dollars. Q: Would you go first or second? What number should you pick?

you and a friend are playing a coin tossing game. You will be tossing a coin and tracking the results. You each have a sequence you're looking for. Your sequence is HTT, your friends sequence is HHT. the player whos sequence appears first in the game wins. Would you want to play? What is your probability of winning?
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Quantitative Trader Intern

Interviewed at Jane Street

4.4★
Aug 6, 2020

you and a friend are playing a coin tossing game. You will be tossing a coin and tracking the results. You each have a sequence you're looking for. Your sequence is HTT, your friends sequence is HHT. the player whos sequence appears first in the game wins. Would you want to play? What is your probability of winning?

15% of 367
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Trader

Interviewed at Jane Street

4.4★
Sep 27, 2013

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