Hudson River Trading Quant Interview: Top Questions & Tips
The quant researcher interview at Hudson River Trading (HRT) is known to be among the most intellectually stimulating in the quantitative finance industry. Candidates are expected to master a broad spectrum of mathematical, statistical, and logical reasoning problems. In this article, we solve and explain some Hudson River Trading quant researcher interview questions.
Consider a random permutation of the numbers \(1, 2, ..., 31415\). Let \(A\) be the number of fixed points (elements that remain in their original position), and let \(B\) be the number of non-fixed points. What is the variance of \(B-A\)?
