Trade Support Interview Questions

8,671 trade support interview questions shared by candidates

2) Given a 100 floor building, and 2 identical eggs (with an unknown capacity to survive a fall from any floor up to floor "x" of the building), how would you minimize the number of drops you need to make in order to determine the highest floor the eggs can be safely dropped from?
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Trading Analyst

Interviewed at Virtu Financial

4
Feb 24, 2012

2) Given a 100 floor building, and 2 identical eggs (with an unknown capacity to survive a fall from any floor up to floor "x" of the building), how would you minimize the number of drops you need to make in order to determine the highest floor the eggs can be safely dropped from?

There is a jar full of 10 coins. 9 are fair, and 1 has both faces showing heads. You draw a coin at random from the jar and flip it 5 times. If you flip heads 5 times in a row, what is the probability that you get heads on your next flip?
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Trading Intern

Interviewed at Susquehanna International Group

3.8
Nov 4, 2015

There is a jar full of 10 coins. 9 are fair, and 1 has both faces showing heads. You draw a coin at random from the jar and flip it 5 times. If you flip heads 5 times in a row, what is the probability that you get heads on your next flip?

A question that is Jane Street-esque would be the following: Suppose there is a game. You flip a coin again and again until you see 2 consecutive heads. What is the expected number of coin flips? Follow up: What is the expected number of tails?
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Trading Intern

Interviewed at Jane Street

4.4
Jan 27, 2015

A question that is Jane Street-esque would be the following: Suppose there is a game. You flip a coin again and again until you see 2 consecutive heads. What is the expected number of coin flips? Follow up: What is the expected number of tails?

You are blindfolded and sitting at a table with 100 quarters. Ten of the quarters are tails-up and 90 are heads up. You wish to separate the quarters into two piles, each with the same number of tails. You can flip as many as you like and the piles don't need to be the same size. How do you do it?
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Trading Intern

Interviewed at Wolverine Trading

4.7
Feb 21, 2012

You are blindfolded and sitting at a table with 100 quarters. Ten of the quarters are tails-up and 90 are heads up. You wish to separate the quarters into two piles, each with the same number of tails. You can flip as many as you like and the piles don't need to be the same size. How do you do it?

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