Jane Street Quantitative Analyst Interview Questions

The questions to prepare for a Jane Street Quantitative Analyst interview. Questions from real interview reports rank first. Updated daily.

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CodingStart here. 4 questions · ~38 min

Determine whether an integer reads identically forward and backward using arithmetic reversal.

Bulb Toggling After 100 RoundsMedium

Assesses your reasoning about toggling patterns and deriving the final state efficiently.

logic

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Keyword Search Console ImplementationMedium

Tests your ability to implement a practical search feature with clear input and output handling.

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Statistics & Probability35 questions · ~328 min

Use conditional probability and symmetry to determine whether the final passenger receives their assigned airplane seat.

Card Color Given Other CardsHard

Derive the probability that the next card matches a specified color or suit after five known cards have been removed.

probabilitymathematical reasoningConditional Probability

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Market-Making Game vs OpponentHard

Model a rational opponent's quote-taking decisions, calculate conditional probabilities, and compare market-making strategies by expected payoff.

market makingExpected ValueConditional Probability

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Behavioral & Leadership10 questions · ~94 min

Why Jane Street Interview InterestEasy

Tests motivation for Jane Street, informed career judgment, intellectual curiosity, and alignment with collaborative quantitative trading.

adaptabilitybehavioralanalytical judgment

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