I applied online. The process took 2 months. I interviewed at Citadel in Nov 2018
Interview
I applied online and received a phone interview about a month later. I didn't do well in the first interview, and I was surprised that I got the second phone interview, in which I did okay. About a month later, I received the rejection letter.
Interview questions [1]
Question 1
linear regression; permutation of a list; how to convert a uniform random variable to a normal random variable
- Questions on Linear Algebra and Coding
- Discussion of a problem at the intersection of optimization and classical machine learning
- No behavioural questions or anything about my personality or work experience, the interview was purely technical
Interview questions [1]
Question 1
- Explain how to compute a product of two very large matrices in a computationally efficient way, using the structure of the problem and the matrices
Start with my own self-introduction and the interviewer's self-introduction first for five minutes, then a couple of technical questions for like thirty minutes, and in the end, questions for the interviewers about the company.
I received the interview a few weeks after applying online. During the interview i was asked by the interviewer about my past experience and also some other related technical questions.