Quant Interview Questions | Glassdoor

# Quant Interview Questions

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Quant interview questions shared by candidates

## Top Interview Questions

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### Quant at Jane Street was asked...

Apr 1, 2012
 2) Alice and Bob play baseball for two periods. Can Alice have a better batting average than Bob in the first period but Bob have a better batting average overall?1 AnswerIt can be even worse than that: on both periods, Alice has a better batting average than Bob, but overall Bob is better. Example: Bob : Period 1) 80 out of 100 successes . Period 2) 6 out of 10 successes Alice: Period 1) 9 out of 10 successes Period 2) 70 out of 100 successes So, For each period, Bob is worse than Alice. But if you add them up, Bob succeeds 86/110 , Alice succeeds 79/110. So Bob is better. How is that possible ? :)) a/b + c/d != (a+c)/(b+d) .

Nov 17, 2010
 what causes volatility smile?1 Answerliquidity..... is certainly one factor

### Quant at Bloomberg L.P. was asked...

Jun 7, 2009
 write down a function to search for a number in given sorted array1 Answerbinary search to speed up

### Quant Entry Level at Morgan Stanley was asked...

Feb 22, 2012
 Gram–Schmidt process for vectors. 1 AnswerWho would still remember that... Got nervous when I heard the question. Luckily he gave me time to deduce the formula from scratch.

### Quant Entry Level at Morgan Stanley was asked...

Feb 22, 2012
 Assume you are the owner of a small grocery store next to a university where they have a weekly sports game. You want to design a method for your soda selling's inventory. Very open questoin, required you to keep asking for more condition and then follow up questions came up depending on your solution.2 AnswersDidn't do well at this one, asked him too many times for hints. Took a lot of time.In linear city model, set it in the middle of the street, it's a result in industrial organization. For details refers to books in this field

### Quant at University of Southern California was asked...

Sep 22, 2010
 does 0 correlation imply independence? give an example1 Answerno. x~N(0,1), y=x^2

### Quant Developer at Instinet was asked...

Aug 13, 2013
 CS questions... 1)what is incorrect in the following code (they already have something written on board) 2)what do you think the design of the following code (this is a different code than above) 3)explain me so and so project from your CV1 Answersecond question was sort of open ended

Nov 4, 2011
 What do you think will happen in Greece?1 AnswerCompletely up to opinion. Seems like there's nothing as a wrong opinion in this case.

### Risk/Quant Alanlysis at BlackRock was asked...

Feb 15, 2011
 black scholes modification for american callBe the first to answer this question