I applied via recommendation from a friend in Citadel. I interviewed at Citadel Securities in September 2019. They asked me questions about probabilities, brain teasers, statistics, programming and machine learning.
Perguntas de entrevista [1]
Pergunta 1
What is the difference between OLS and Ridge regression?
Fiz uma entrevista na empresa Citadel Securities (Singapura).
Entrevista
Long telephonic and video interview. Maths, probability questions and a small programming assignment. Moderate difficult interview level. Motivation/ interest to join cit sec. Started
on time and very efficient use of time
It was mostly about coding. I was first being asked to share my research experience followed by a Q&A, and then we moved on to a DP problem. Since we discussed my research for ~ 40 min, I didn't have time to finish testing my code.
Fiz uma entrevista na empresa Citadel Securities (New York, NY).
Entrevista
Internal matching process, then straight to a technical round. Technical Interview, some probability (brainteaser style, refresh conditional probability and Markov Chain) and linear regression, plus some coding puzzle (leetcode style medium)
Perguntas de entrevista [1]
Pergunta 1
Anything you know about linear regression and related follow ups
