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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
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- 11
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- 8
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Showing 7531–7560 of 9403 results
- SIG (Susquehanna)EasyData ScientistFind a Green Triangle's Weight in a Balanced Mobile
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.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumSoftware EngineerFind and Fix C++ Ownership Bugs: Double Free, Shallow Copy, and Object Slicing
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.
Software Engineering FundamentalsOnsiteC++Memory ManagementRAII - SIG (Susquehanna)MediumData ScientistFind probability of overlapping blooms
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.
Statistics & MathOnline Assessment - SIG (Susquehanna)EasyData ScientistFind the Expected Number of Consecutive Chosen Pairs
Calculate the expected number of consecutive pairs in a uniformly chosen subset of integers using indicator variables and linearity of expectation.
Statistics & MathOnline Assessmentprobabilitycombinatoricsexpected-value - SIG (Susquehanna)EasyData ScientistFind the Probability Two Muffins Are Sufficient
This problem tests binomial probability distributions and the cumulative probability of independent discrete events.
Statistics & MathOnline AssessmentProbabilityBinomial DistributionStatistics - SIG (Susquehanna)EasyData ScientistFind the Success Probability of Bold Betting
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.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumSoftware EngineerImplement a Simplified std::vector with Manual Memory Management
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.
Software Engineering FundamentalsOnsitecppmemory-managementdata-structures - SIG (Susquehanna)EasySoftware EngineerIndex a CSV Movie Catalog for Fast Year-Range Queries
Design an immutable movie catalog that parses CSV data and supports fast, inclusive year-range queries using binary search or indexing.
Software Engineering FundamentalsOnsitebinary-searchdata-structurescsv-parsing - SIG (Susquehanna)EasyData ScientistInfer posterior after losing pick
This question evaluates a candidate's understanding of conditional probability and posterior inference, assessing the ability to update probability estimates after observing that a chosen option did not occur.
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 - SIG (Susquehanna)EasyData ScientistResolve Two Knights-and-Knaves Statements
This question tests logical deduction and systematic case analysis under binary truth constraints.
Statistics & MathOnline AssessmentLogicPuzzlesDiscrete Math - SIG (Susquehanna)MediumSoftware EngineerRotate a Square Matrix Clockwise While Both Diagonals Stay Fixed
Rotate every element of a square matrix that lies off both diagonals by 90 degrees clockwise a given number of times, leaving the main-diagonal and anti-diagonal values in place. It tests precise index mapping, handling of odd and even matrix sizes, and bug-free simulation under timed assessment conditions.
Coding & AlgorithmsOnline Assessment - SIG (Susquehanna)EasyData ScientistSolve Barn Animal Counts from Total Legs
Tests setting up and solving a system of linear equations from verbal constraints using substitution to determine integer entity counts.
Statistics & MathOnline Assessmentmathalgebraquantitative-reasoning - SIG (Susquehanna)EasyData ScientistSolve animals-and-legs count
This question evaluates a candidate's ability to translate a word problem into a system of linear equations and perform basic algebraic manipulation and arithmetic to determine unknown quantities.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumData ScientistSolve relative-truth cat puzzle
This question evaluates logical deduction, constraint satisfaction, and quantitative manipulation of percentages and averages within a relative truth/lie framework, and is categorized under Statistics & Math and discrete logic puzzles.
Statistics & MathOnline Assessment - SIG (Susquehanna)MediumSoftware EngineerSolve theatre seating and ticker extraction
This question evaluates algorithmic problem-solving skills across two areas: efficient seat-allocation and interval occupancy reasoning for grouping in a constrained seating layout, and robust string processing with phrase-based, case-insensitive matching and mapping to ticker identifiers.
Coding & AlgorithmsOnsite - SIG (Susquehanna)MediumSoftware EngineerTrees and Binary Search Trees: Taxonomy, Invariant, and Traversal/Search
Tests understanding of binary tree taxonomy, global BST invariants versus local parent-child checks, and efficient tree search under range constraints.
Software Engineering FundamentalsOnsitebinary-search-treetree-traversalrecursion - SIG (Susquehanna)EasyData ScientistUse Bayes for factory identification
This question evaluates understanding of Bayesian inference and conditional probability by asking for the posterior probability that two observed black widgets originated from a specific factory.
Statistics & MathOnline Assessment - SalesforceHardSoftware EngineerAnswer ownership, conflict, and failure recovery questions
This question evaluates ownership, conflict resolution, incident response, stakeholder management, and accountability competencies relevant to software engineering.
Behavioral & LeadershipTechnical Screen - SalesforceHardSoftware EngineerArchitect serving and storage for recommender
Architect serving and storage for recommender evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignTechnical Screen - SalesforceMediumSoftware EngineerBehavioral deep dive: scaling decisions, zero-to-one platforms, traffic spikes, conflict
Hiring manager behavioral round for a senior backend engineer: a deep dive into a system you own with probing on scaling decisions and failure modes, plus stories about building a platform from zero, handling an unexpected traffic spike, resolving cross-team conflict, and motivation for the move.
Behavioral & LeadershipOther - SalesforceMediumSoftware EngineerBehavioral: Coaching a Teammate and Upholding Team Coding Standards
Two-part behavioral question for senior engineers: how you helped a teammate get better at a specific task, and how you maintain coding standards across your team. It tests mentoring approach, measurable growth, automating standards, code review norms and building team buy-in.
Behavioral & LeadershipOther - SalesforceMediumSoftware EngineerBehavioral: Pivoting Mid-Project and Handing Off Work You Owned
Two-part behavioral question for senior engineers: a time you had to pivot in the middle of a project, and a time you were pulled off a project where you were the main point of contact. It tests adaptability, re-planning, stakeholder communication and responsible handoffs.
Behavioral & LeadershipOther - SalesforceMediumSoftware EngineerBinary Tree Path Sum
Determine if a binary tree contains a root-to-leaf path whose node values add up to a given target sum.
Coding & AlgorithmsOnsiteBinary TreeDFSBFS - SalesforceMediumSoftware EngineerChoose DynamoDB vs MySQL for a backend
This question tests your ability to evaluate database technologies based on specific application requirements, trade-offs in consistency models, and operational scalability.
Software Engineering FundamentalsTechnical ScreenSystem DesignDatabaseNoSQL - SalesforceMediumMember of Technical StaffConvert a Sorted Doubly Linked List to a Balanced BST In Place
Tests in-place pointer manipulation and bottom-up tree construction by converting a sorted doubly linked list into a height-balanced binary search tree in linear time.
Software Engineering FundamentalsOnsitelinked-listbinary-search-treerecursion - SalesforceMediumSoftware EngineerConvert integer to NAF form
This question evaluates understanding of number representations (Non-Adjacent Form), bit-level optimization, and formal proof techniques for demonstrating minimal Hamming weight, together with algorithmic complexity analysis.
Coding & AlgorithmsOnline Assessment
SIG (Susquehanna)
Salesforce