# Research Intern Interview Questions

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### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “3) Poker. 26 red, 26 black. Take one every time, you can choose to guess whether it’s red. You have only one chance. If you are right, you get 1 dollar. What’s the strategy? And what’s the expected...”

### Quant Research Intern at Susquehanna International Group, LLP

Mar 17, 2013
 “Suppose you have two covariance matrices A and B. Is AB also a covariance matrix? Suppose that, by plain dumb luck, we also have that AB=BA. Is AB a covariance matrix under this additional...”

### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “2) A. 10 ropes, each one has one red end and one blue end. Each time, take out a red and a blue end, make them together. Repeat 10 times. The expectation of the number of loops. B. 10 ropes, no...”

### Quantitative Researcher Summer Intern at Jane Street

Apr 17, 2011
 “1) Tow coins, P(head)=1/3, P(tail)=2/3, design a way to get the effect of fair coin”

### Quant Research Intern at Susquehanna International Group, LLP

Mar 17, 2013
 “Suppose you have 100 GB of data that you want to sort, but you only have 1 GB of memory. How would you sort this data?”

### Digital Media Research Intern at Intel Corporation

May 17, 2011
 “What do you see as the current trend of PC gaming?”

### Research & Development Intern at Lincoln Electric

Oct 20, 2009
 “If you were working in a neat set-up and found that a tool was missing which was needed to complete a task quickly to meet a deadline, what would you do? If no replacement tool was found, how...”

### Research Intern at MD Anderson Cancer Center

Jul 18, 2012
 “Why not medical school?”

### Senior Intern/Clinical Research Associate I at Medpace

Oct 20, 2014
 “What makes me qualified for this position and why?”

Jun 7, 2012