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Quantitative Trader Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 1–14 of 14 results
- DRWEasyQuantitative TraderAnalyze distribution of a 3-dice product
This question tests the ability to analyze the probability distribution of the product of three independent discrete random variables and apply these statistical properties to practical risk management.
Statistics & MathOnline AssessmentProbabilityExpectationStatistics - DRWEasyQuantitative TraderCompute expected arc length on a circle
This question evaluates understanding of geometric probability, order statistics on a circle, and expectation computation for continuous random variables.
Statistics & MathOnline Assessment - ImcHardQuantitative TraderAnalyze Optimal Funding Allocations Across Election Districts
Analyze election-district funding games with weak-composition counting, favorable alignments, explicit allocations, and lower-bound proofs for possible and impossible wins under fixed budgets.
Statistics & MathTechnical Screen - Jane StreetMediumQuantitative TraderEstimate the Number of Florists in Sydney and Make a Market
Tests Fermi estimation, sanity checking via dual perspectives (demand vs. supply/geographic), quoting a two-sided market under uncertainty, and updating beliefs given market flow or new information.
Statistics & MathTechnical ScreenFermi EstimationMarket MakingProbability - Jane StreetEasyQuantitative TraderSolve probability and game-theory puzzles
This set of puzzles evaluates probabilistic reasoning, Bayesian inference, expected-value optimization, optimal stopping, and strategic game-theoretic reasoning under uncertainty and asymmetric information, situated in the Statistics & Math domain.
Statistics & MathTechnical Screen - OptiverMediumQuantitative TraderCompute odds under time pressure
This question evaluates probabilistic reasoning and combinatorial calculation skills, including conditional probability, distributional thinking and the ability to convert probabilities into odds.
Statistics & MathOnline Assessment - OptiverHardQuantitative TraderOptimize interval-scoring strategy
This interview question evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer for Optimize interval-scoring strategy states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Statistics & MathTechnical Screen - SIG (Susquehanna)MediumQuantitative TraderBayesian Posterior That k Red Parts Came From Factory A
A probability question on Bayesian updating: one of two factories with different red-part rates is chosen at random, and k parts drawn from it are all red. It asks for the conditional probability that the parts came from the first factory, testing likelihoods, priors and careful evaluation of powers.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderExpected Number of Same-Rank Pairs in a Hand Dealt Without Replacement
An expectation question about dealing K cards without replacement from a deck of M ranks with N cards each, then counting the same-rank pairs in the hand. It tests linearity of expectation, probabilities when drawing without replacement, and how the definition of a pair changes the answer.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderExpected Payoff of a Three N-Sided Dice Matching Game
An expected value question about rolling three fair N-sided dice, with different payoffs when all three match, exactly two match, or all differ. It tests counting the outcome classes correctly for a general number of faces and combining them into one expected payoff, including a variant where the all-different outcome costs money.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderProbability Limited Stock Covers Every Customer in a Queue
A binomial probability question about a queue of N customers who each choose one of two products, with only M units of one product left in stock. It asks for the probability that the stock is enough, or exactly enough, for every customer who wants it, testing distribution modeling and the efficient evaluation of tail sums.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderProbability Two Randomly Started Flower Bloom Periods Overlap
A probability question about two flowers that start blooming on random days within a D-day window and stay in bloom for different lengths of time. It asks for the probability that both are in bloom together at some point, testing interval-overlap reasoning, exact counting, and discrete versus continuous modeling.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderProbability You Picked the Strongest Cat Given Your Cat Lost the Race
A conditional probability puzzle about three cats in a race with known winning probabilities. You cheer for a randomly chosen cat, learn whether it won or lost, and must find the probability that you picked the strongest or the weakest cat, testing Bayes' rule and the choice of conditioning event.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumQuantitative TraderProbability of Reaching a Chip Target Under Bold Betting
A gambling probability question: starting with A chips and aiming for B, a player uses bold play, staking either all chips or just what is needed to reach the target, and wins each even-money round with probability p. It asks for the probability of reaching the target before going broke, testing recursive state analysis.
Statistics & MathOnline Assessment
DRW
Imc
Jane Street
Optiver
SIG (Susquehanna)