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Software Engineer 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
- Topics
- 8
- Languages
Showing 1201–1230 of 2810 results
- HarveyMediumSoftware EngineerIncremental Variable Resolver for a Build Pipeline
Build an in-memory variable resolver for a CI configuration system in three stages: plain integer variables, expression variables that reference other variables, then cycle detection with recomputation limited to the affected dependents. Checks whether a candidate can grow a design incrementally, respect a correct computation order, and reason about a dependency graph under change.
Software Engineering FundamentalsTechnical Screengraphsdependency-resolutiondesign - HarveyMediumSoftware EngineerMini Spreadsheet with Formulas Evaluated in set_cell and Cycle Rejection
A three-part coding exercise: build a mini spreadsheet with set_cell and get_cell, add formulas that sum constants and cell references with values computed eagerly in set_cell, and detect and reject circular dependencies. It tests dependency graphs, ordered recomputation and cycle checks.
Software Engineering FundamentalsTechnical Screen - HarveyMediumSoftware EngineerOwnership, Tough Feedback, and an Important Problem Outside Your Focus Area
Three behavioral questions from a hiring manager screen: a project you owned in the last year, tough feedback you received, and a time you discovered an important problem outside your immediate focus area. It tests ownership, coachability and judgment about raising issues beyond your own scope.
Behavioral & LeadershipTechnical Screen - HarveyMediumSoftware EngineerSpreadsheet Class With Set/Get, Cell-Reference Formulas and Cycle-Rejecting Writes
Implement an in-memory spreadsheet class in three steps: set and get integer cell values, support formulas that reference other cells, and reject any write that would create a circular reference while leaving the sheet unchanged. It tests dependency tracking, update propagation and cycle detection.
Software Engineering FundamentalsTechnical Screen - HarveyMediumSoftware EngineerSpreadsheet Class with Formula Cells, Recalculation and Cycle Detection
Build an in-memory spreadsheet class in three stages: integer cells with set_cell and get_cell, formula cells such as =B1+C1+1 with explicit handling of never-set cells and recomputation on every write, then cycle detection and recomputing only dependent cells. Tests incremental design, evaluation order and dependency graphs.
Software Engineering FundamentalsTechnical Screen - HarveyMediumSoftware EngineerSpreadsheet Formula Engine with Cycle Detection
Design an in-memory spreadsheet formula engine supporting cell assignments, formula evaluation with dependencies, and cycle detection. The question tests directed graph modeling, topological invalidation, and cycle detection algorithms.
Coding & AlgorithmsTechnical Screengraphcycle-detectiontopological-sort - HeadwayMediumSoftware EngineerBehavioral: Deciding With Limited Data, a Process Built With AI, Spec-Driven Delivery
A behavioral screen with three prompts: a decision made with limited data, a process you implemented with AI, and a project delivered with minimal manual effort through spec-driven development. It tests judgment under uncertainty, verification of AI output, and turning requirements into a specification that drives the work.
Behavioral & LeadershipTechnical Screen - HeadwayMediumSoftware EngineerDebug and extend obstacle-run statistics classes
This question evaluates object-oriented design, debugging, algorithmic reasoning, and probabilistic simulation competencies by requiring fixes to class behavior, implementation of aggregate statistics, and a Monte Carlo-based probability estimator.
Coding & AlgorithmsTechnical Screen - HeadwayMediumSoftware EngineerDesign a Rental Search and Booking Platform from Startup to Scale
Design a short-term rental search and booking system, balancing eventual consistency in search discovery with strict consistency during reservations and checkout.
System DesignTechnical Screensystem-designconcurrencydistributed-systems - HeadwayMediumSoftware EngineerDesign a Shopping Cart Service That Keeps Inventory Consistent Under Concurrency
Design the backend for an online store's shopping cart, with the focus on inventory consistency: when stock is reserved, how two shoppers racing for the last unit are resolved, and how abandoned holds are released. It tests data modeling, concurrency control, checkout failure handling and contention on popular items.
System DesignTechnical Screen - HeadwayMediumSoftware EngineerExplain a Challenging Project, Influence, and Mentorship
This question assesses a candidate's ability to articulate complex professional narratives, specifically focusing on technical leadership, conflict resolution, and the cultivation of junior talent.
Behavioral & LeadershipTechnical ScreenBehavioralLeadershipMentorship - HeadwayMediumSoftware EngineerGenerate Every Letter String a Phone Keypad Digit Sequence Can Spell
Given a string of digits from 2 to 9, return every letter string those digits can spell on a standard phone keypad, in lexicographic order. It tests systematic enumeration of combinations, keys that carry four letters, and producing a deterministic output order.
Coding & AlgorithmsTechnical Screen - HeadwayMediumSoftware EngineerHandle traffic spikes and estimate server capacity
This question evaluates a candidate's competency in performance troubleshooting, capacity planning, and scalable system architecture, focusing on diagnosing overload causes and quantifying infrastructure needs.
System DesignTechnical Screen - HeadwayHardSoftware EngineerImplement Journey Counter and Speeder Detector
This problem tests your ability to process time-series event data by grouping related actions, managing state across sequences, and performing geometric or threshold-based calculations.
Coding & AlgorithmsTechnical ScreenHash MapsTime-SeriesState Management - HeadwayMediumSoftware EngineerImplement Layered Endpoint and Global Rate Limits
This problem tests your ability to design a thread-safe, memory-efficient rate limiter that manages hierarchical quotas using a rolling window mechanism.
Software Engineering FundamentalsTechnical ScreenConcurrencyRate-LimitingAlgorithms - HebbiaMediumSoftware EngineerDesign Hebbia Chat for SEC Filings
This problem tests your ability to design a retrieval-augmented generation (RAG) system specialized for financial documents, focusing on multi-agent orchestration, citations, and latency management.
ML System DesignTechnical ScreenRAGLLMSystem Design - HebbiaMediumSoftware EngineerImplement Ultimate Tic-Tac-Toe
This problem tests your ability to design a state-management system for a nested game board and implement recursive winner-detection logic.
Coding & AlgorithmsTechnical ScreenOODState ManagementGame Theory - HeygenMediumSoftware EngineerBuild a GPU VM Fleet CLI
This problem tests your ability to design a robust CLI interface and state management logic for an abstraction layer that interacts with multiple heterogeneous cloud GPU providers.
Software Engineering FundamentalsTechnical ScreenSystem DesignCLICloud Computing - Hive.AiEasySoftware EngineerDesign a Synchronous Text Classification API
This question tests the ability to architect a robust, scalable, and maintainable synchronous ML inference service, focusing on operational reliability and multi-tenant management.
ML System DesignTechnical ScreenSystem DesignAPI DesignMLOps - Hive.AiHardSoftware EngineerDetect a Reachable Negative Cycle
This problem tests the implementation of the Bellman-Ford algorithm to identify negative cycles reachable from a source vertex, specifically requiring careful handling of unreachable nodes to avoid incorrect cycle detection.
Coding & AlgorithmsTechnical ScreenGraphsShortest-PathBellman-Ford - Hive.AiHardSoftware EngineerMeasure Water Trapped Between Elevations
This problem tests the ability to solve a classic dynamic programming/two-pointer challenge by calculating the volume of trapped water between bars of varying heights.
Coding & AlgorithmsTechnical ScreenArraysTwo PointersDynamic Programming - Hive.AiHardSoftware EngineerTrack the Median of a Stream
This problem tests your ability to maintain sorted order in a streaming context using balanced data structures to achieve optimal time complexity for insertions and median retrieval.
Coding & AlgorithmsTechnical ScreenHeapsData StructuresStreaming Algorithms - Hive.AiHardSoftware EngineerValidate Adding an Edge to a Directed Acyclic Graph
This problem tests your ability to manipulate graph structures and implement reachability checks, specifically ensuring that adding an edge to a Directed Acyclic Graph (DAG) maintains its acyclic property.
Coding & AlgorithmsTechnical ScreenGraphsDAGDFS/BFS - HubSpotMediumSoftware EngineerValidate hiring request under role constraints
This problem tests your ability to manage state mapping and validate cardinality constraints using hash maps, requiring efficient lookups to ensure hiring requests remain within predefined role limits.
Coding & AlgorithmsTechnical ScreenHash MapsData ValidationState Management - Hudson River TradingMediumSoftware EngineerApproach verbose data-structure design
This question evaluates a candidate's ability to design and implement complex data structures, testing algorithmic reasoning, time/space complexity analysis, state modeling, and organization of code and tests.
Coding & AlgorithmsTechnical Screen - Hudson River TradingEasySoftware EngineerBall Position in a Tilting Maze After Timed Tilt Events
Live coding simulation problem: a ball sits in a grid maze on a board that can tilt up, down, left or right or lie flat, and timed events change the tilt. Return the ball's cell at an end time that can be very large. It tests precise timing rules, wall handling and movement code that scales to long time spans.
Coding & AlgorithmsTechnical Screen - Hudson River TradingHardSoftware EngineerC++ Fundamentals: Memory, Compilation, and Containers
Tests deep C++ expertise in zero-allocation data structures, cache-line alignment, manual object lifecycle management via placement new, and the compilation/inlining implications of template-based designs.
Software Engineering FundamentalsTechnical ScreenC++Memory ManagementData Structures - Hudson River TradingMediumSoftware EngineerCalculate Completion Time for a Single-Server Reactor Queue
Simulate a single-threaded reactor queue with a bounded buffer to compute the completion timestamp or drop status for each incoming task.
Coding & AlgorithmsTechnical ScreenQueueSimulationArrays - Hudson River TradingEasySoftware EngineerCheck Root-To-Leaf Target Sums In A Binary Tree
This question tests your ability to traverse a binary tree using depth-first search (DFS) or breadth-first search (BFS) while tracking path accumulators and accurately identifying valid leaf nodes.
Coding & AlgorithmsTechnical ScreenBinary TreeDFSRecursion - Hudson River TradingMediumSoftware EngineerChoose Mean or Median for Trading Profit Metrics
This problem tests your understanding of statistical measures of central tendency, specifically how different distributions affect the choice between mean and median in high-frequency trading scenarios.
Statistics & MathTechnical ScreenStatisticsFinanceData Analysis
Harvey
HubSpot
Hudson River Trading