The first round was ~30 minutes of phone interview. The interviewer asked 2~3 questions, mainly about probability, combinatorics and math. I didn't manage to pass the first round so these are all I know.
Domande di colloquio [1]
Domanda 1
Q: Integrate xlogx.
Q: Put the numbers 1~1000 around a circle in order. Start at 1, you delete the number 1, 3, 5, ... and carry on this pattern of deleting numbers alternatively until there's only one number left. Determine that number.
Ho presentato la mia candidatura tramite un selezionatore. Ho sostenuto un colloquio presso Citadel
Colloquio
After the initial recruiter call, I moved on to a 45-minute virtual interview. The session was a mix of LeetCode-style algorithmic problems, along with some probability and statistics questions. The coding portion wasn't too difficult—I'd say it was around the Medium level.
Domande di colloquio [1]
Domanda 1
X,Y and Y,Z positive correlated. What can we say about X,Z
Ho presentato la mia candidatura tramite un selezionatore. Ho sostenuto un colloquio presso Citadel
Colloquio
Reach out directly without oa, give some basic probability and stats question, also ask about something on the resume. the interviewer is pretty nice, and answered all questions, still got rejected lol
Ho sostenuto un colloquio presso Citadel (New York, NY)
Colloquio
Two phone screens, one was a Leetcode Easy coding problem along with general ML questions. Second asked some probability statistics questions. Last one was about my research and a general feeler about my knowledge of economics and current events.
Domande di colloquio [1]
Domanda 1
If you have a dataset with many features, what methods can you used to reduce the dimension?
