X and Y are two independent variables with uniform distributions form 0 to 1. Z = X + Y. What is the variance of Z. What is the correlation between X and Z? What does the distribution of Z look like?
Quantitative Developer Interview Questions
612 quantitative developer interview questions shared by candidates
They asked some python question like what's difference between tuples and list, what are decorators in python etc
Find the eigenvalue and eigenvectors of a n by n matrix with all 1's.
Programming question
N coffee chains are competing for market share by a fierce advertising battle. each day a percentage of customers will be convinced to switch from one chain to another. Current market share and daily probability of customer switching is given. If the advertising runs forever, what will be the final distribution of market share? Assumption: N is an integer less than 25, Total market share is 1.0, probability that a customer switches is independent of other customers and days. Example: 2 coffee chains: A and B market share of A: 0.4 market share of B: 0.6 Each day, there is a 0.2 probability that a customer switches from A to B Each day, there is a 0.1 probability that a customer switches from B to A input: market_share=[0.4,0.6], switch_prob = [[.8,.2][.1,.9]] output: [0.3333 0.6667]
In the third problem, you are given a set of tetris-style pieces, and a rectangle. your job is to fit the pieces into rectangle if possible
Hackerrank test: some basic programming, a machine learning question Phone screen: python basics (not algorithms), prob stats
Graph search (BFS like) and a numerical question
1. How does malloc work? 2. What does compiler create for you in an empty class in C++? 3. A file of n 32 bit ints, where n = 4*10**9, find a valid int that is not in the file. If n=10**6, would you use the same algorithm?
The most unexpected questions was how would you color a 3-colorable graph. I was initially thinking that you had to do something efficient, which isn't possible, but he just wanted some way of doing it.
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