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?
Given 100 numbers, what would you do to tell the distribution of these numbers?
Given three roots x_{1}, x_{2}, x_{3} of a polynomial P(x) of 3rd degree, find P(1)
How many N in [100,400] s.t. N^N is perfect square
The online test consists of brainteasers and tricky math questions, mainly probability and stat.
Well, I could not speak to them.
Standard questions about background - surprising lack of technicality/intensity in the questions.
As a mental math exercise, what is the square root of 1420?
general questions about math, modeling and quantitative finance
Regular questions related to data structures and algorithms.
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