Quantitative Researcher Intern Interview Questions

2,685 quantitative researcher intern interview questions shared by candidates

What will be the value of C after running the following pseudo-code? a is 1 B is 100 C is 0 Loop 10000 times: C is average of a and B If a is equal to C or B is equal to C: Exit Loop Set a to B Set B to C ®A. Between 0 and 35 Ob. Between 35 and 45 Oc. Between 45 and 55 Qd. Between 55 and 65 Oe. Between 65 and 75 Of. Between 75 and 100
avatar

Quantitative Researcher

Interviewed at WorldQuant

4.2
Dec 21, 2015

What will be the value of C after running the following pseudo-code? a is 1 B is 100 C is 0 Loop 10000 times: C is average of a and B If a is equal to C or B is equal to C: Exit Loop Set a to B Set B to C ®A. Between 0 and 35 Ob. Between 35 and 45 Oc. Between 45 and 55 Qd. Between 55 and 65 Oe. Between 65 and 75 Of. Between 75 and 100

You have a function F that computes the product of matrices. If X is MxN matrix and Y is NxK matrix then F(X,Y) is going to output matrix product X*Y and take MxNxK nanoseconds. You need to calculate a product of five matrices, P=A*B*C*D*E. The dimensions of the matrices are as follows: A is 2x100, B is 100x10, C is 10x10, D is 10x100, and E is 100x2. How many nanoseconds does it take to calculate P in the fastest way possible using only function F?
avatar

Quantitative Researcher

Interviewed at WorldQuant

4.2
Dec 21, 2015

You have a function F that computes the product of matrices. If X is MxN matrix and Y is NxK matrix then F(X,Y) is going to output matrix product X*Y and take MxNxK nanoseconds. You need to calculate a product of five matrices, P=A*B*C*D*E. The dimensions of the matrices are as follows: A is 2x100, B is 100x10, C is 10x10, D is 10x100, and E is 100x2. How many nanoseconds does it take to calculate P in the fastest way possible using only function F?

Person A walks up an escalator at 2 steps/second. Person B walks up an escalator at 3 steps/second. Person B gets on the escalator 5 seconds after A and arrives at the top X seconds after A. (I forgot the exact value of X) If the escalator is moving at 1 step/second, how many steps are visible on the escalator at a single point in time?
avatar

Quantitative Researcher

Interviewed at Jane Street

4.4
Dec 30, 2020

Person A walks up an escalator at 2 steps/second. Person B walks up an escalator at 3 steps/second. Person B gets on the escalator 5 seconds after A and arrives at the top X seconds after A. (I forgot the exact value of X) If the escalator is moving at 1 step/second, how many steps are visible on the escalator at a single point in time?

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