SIG (Susquehanna) interview questions

Showing 1–30 of 44 results

• Analyze Knights-and-Knaves Dialogue VariantsMedium

  Analyze Knights-and-Knaves Dialogue Variants evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  SIG (Susquehanna)Data ScientistStatistics & MathTechnical Screen
• Bayesian Posterior That k Red Parts Came From Factory AMedium

  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.

  SIG (Susquehanna)Quantitative TraderStatistics & MathOnline Assessment
• Calculate Expected Payoff from Two DiceEasy

  This problem tests fundamental knowledge of probability, expected value, and partitioning sample spaces to calculate the average outcome of a stochastic process.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Compute Conditional Age Probability Among CyclistsEasy

  This question tests the ability to interpret a contingency table and calculate conditional probabilities by narrowing the sample space to a specific sub-group.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Compute answers to probability and counting puzzlesHard

  This problem tests your ability to model sequential probabilistic events using combinatorics and conditional probability, specifically requiring the calculation of expected outcomes in a game of chance.

  SIG (Susquehanna)Data ScientistStatistics & MathTechnical Screen
• Compute bus-on-time and dice-sum probabilitiesMedium

  This problem tests your ability to calculate probabilities involving continuous uniform distributions and discrete combinations of independent events.

  SIG (Susquehanna)Data ScientistCoding & AlgorithmsHR Screen
• Compute ruin probability with bold bettingMedium

  This question evaluates understanding of probability theory and stochastic processes, focusing on ruin probabilities under a bold betting strategy with state-dependent wagers.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Compute stockout sufficiency probabilityEasy

  This question evaluates understanding of discrete probability and binomial models for independent Bernoulli trials, testing the ability to compute the probability that a limited resource meets random demand.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Compute the Probability Two Bloom Intervals OverlapEasy

  Calculate the probability that two independent events with different known durations overlap within a fixed time window using geometric probability.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Condition on a Chosen Rabbit LosingEasy

  Calculate the conditional probability that a randomly selected rabbit is the least athletic of three rabbits given that it lost its benchmark race, using Bayes' theorem.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Count Cookie Flavor CombinationsEasy

  Calculate the number of distinct unordered combinations when selecting 5 cookies from 4 available flavors with replacement, and contrast this with the ordered outcome space.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Count Equal-Difference Triples After Each Add or Remove-All OperationMedium

  Process a stream of add-one and remove-all operations on a multiset and report, after each operation, how many element triples form an arithmetic progression with a fixed positive difference. It tests efficient incremental updates, correct treatment of duplicate occurrences, and counts that exceed the 32-bit range.

  SIG (Susquehanna)Software EngineerCoding & AlgorithmsOnline Assessment
• Count Grid Paths with No Three Equal MovesEasy

  Count lattice paths from `(0, 0)` to `(5, 5)` that never use three identical directions consecutively. The solution converts paths into alternating runs of length one or two, counts bounded compositions for equal and unequal run totals, and derives 84 valid paths.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Count subarrays with odd zero countMedium

  This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Count subarrays with odd zero count states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  SIG (Susquehanna)Software EngineerCoding & AlgorithmsOnline Assessment
• Deduce Cat Counts from Conditional Truth RulesEasy

  Deduce the exact number of cats owned by three individuals based on conditional truth-telling rules, percentage relations, and average constraints.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Design a Cash Register with Inventory and Profit TrackingEasy

  Design an object-oriented cash register that manages multi-lot product inventory using FIFO accounting, executes atomic multi-item sales, and accurately tracks realized gross profit.

  SIG (Susquehanna)Software EngineerSoftware Engineering FundamentalsOnsite
• Determine a Canoe Departure TimeEasy

  This problem tests algebraic modeling and systems of linear equations by requiring the candidate to derive the counts of different entities based on a total sum constraint.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Determine departure time from travel timesMedium

  This question evaluates a candidate's understanding of relative motion, time-distance-rate relationships, algebraic modeling, and quantitative reasoning. Commonly asked in technical interviews for Statistics & Math and Data Scientist roles, it assesses the practical application of setting up and manipulating equations from multi-step word problems rather than purely conceptual theory.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Determine knights and knaves rolesEasy

  This interview question evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer for Determine knights and knaves roles states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  SIG (Susquehanna)Data ScientistStatistics & MathTechnical Screen
• Expected Number of Same-Rank Pairs in a Hand Dealt Without ReplacementMedium

  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.

  SIG (Susquehanna)Quantitative TraderStatistics & MathOnline Assessment
• Expected Payoff of a Three N-Sided Dice Matching GameMedium

  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.

  SIG (Susquehanna)Quantitative TraderStatistics & MathOnline Assessment
• Find Company Tickers Mentioned in a News HeadlineEasy

  Implement a headline scanner that identifies mentioned company names using whole-word matching and returns their unique stock tickers in the order specified by the input mapping.

  SIG (Susquehanna)Software EngineerCoding & AlgorithmsOnsite
• Find Expected Spins Until Two Regions AppearEasy

  This problem tests knowledge of expected value and geometric distributions by calculating the expected number of trials to observe two distinct outcomes from a discrete probability distribution.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Find a Green Triangle's Weight in a Balanced MobileEasy

  Solve a nested balanced-mobile puzzle and determine the green triangle's weight from a 160-pound total. The worked derivation uses an explicit equal-arm, massless-bar assumption, propagates whole-submobile weights upward, and explains why the left branch alone fixes the answer at 10 pounds.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Find and Fix C++ Ownership Bugs: Double Free, Shallow Copy, and Object SlicingMedium

  Tests a candidate's ability to identify and fix critical C++ resource management bugs, specifically shallow copies leading to double-free errors and object slicing caused by improper pass-by-value semantics with polymorphic types.

  SIG (Susquehanna)Software EngineerSoftware Engineering FundamentalsOnsite
• Find probability of overlapping bloomsMedium

  This question evaluates understanding of probability theory, specifically reasoning about continuous uniform distributions, geometric probability, and the likelihood of overlap between random time intervals within a fixed horizon.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Find the Expected Number of Consecutive Chosen PairsEasy

  Calculate the expected number of consecutive pairs in a uniformly chosen subset of integers using indicator variables and linearity of expectation.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Find the Probability Two Muffins Are SufficientEasy

  This problem tests binomial probability distributions and the cumulative probability of independent discrete events.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Find the Success Probability of Bold BettingEasy

  Calculate the chance of reaching five tokens before ruin under a bold, state-dependent betting rule. The solution enumerates the transitions, sets absorbing boundaries, solves the four-state recurrence for win probability one-third, and obtains 15/77 from an initial fortune of two.

  SIG (Susquehanna)Data ScientistStatistics & MathOnline Assessment
• Implement a Simplified std::vector with Manual Memory ManagementMedium

  Tests practical systems programming in C++, specifically decoupling raw memory allocation from object construction, managing dynamic capacity growth, and adhering to the Rule of Five.

  SIG (Susquehanna)Software EngineerSoftware Engineering FundamentalsOnsite