Intern Interview Questions

248,704 intern interview questions shared by candidates

A cube that is white on the inside is painted blue and then chopped into thirds along each dimension (resulting in 27 smaller cubes). Blindfolded, I pick a cube at random and toss it in the air so that it lands on the ground with one side down. I open my eyes and see that all of the visible sides of the cube are white. What is the probability that the side that is currently face down is blue?
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Intern

Interviewed at Jane Street

4.4
Oct 8, 2015

A cube that is white on the inside is painted blue and then chopped into thirds along each dimension (resulting in 27 smaller cubes). Blindfolded, I pick a cube at random and toss it in the air so that it lands on the ground with one side down. I open my eyes and see that all of the visible sides of the cube are white. What is the probability that the side that is currently face down is blue?

You are playing a game where the player gets to draw the number 1-100 out of hat, replace and redraw as many times as they want, with their final number being how many dollars they win from the game. Each "redraw" costs an extra $1. How much would you charge someone to play this game?
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Prop Trading Summer Intern

Interviewed at Jane Street

4.4
Mar 11, 2011

You are playing a game where the player gets to draw the number 1-100 out of hat, replace and redraw as many times as they want, with their final number being how many dollars they win from the game. Each "redraw" costs an extra $1. How much would you charge someone to play this game?

I have 10 cards face-down numbered 1 through 10. We play a game in which you choose a card and I give you the corresponding dollar amount. a) What is the fair price of this game? b) Now, after picking a card you can either take the dollar value on the card or $3.50. Also, cards worth less than 5 are now valued at $0. What is the maximum price you are now willing to pay for the game?
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Trading Intern

Interviewed at Susquehanna International Group

3.8
Jan 9, 2012

I have 10 cards face-down numbered 1 through 10. We play a game in which you choose a card and I give you the corresponding dollar amount. a) What is the fair price of this game? b) Now, after picking a card you can either take the dollar value on the card or $3.50. Also, cards worth less than 5 are now valued at $0. What is the maximum price you are now willing to pay for the game?

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