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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
- Companies
- 11
- Topics
- 8
- Languages
Showing 31–60 of 781 results
- Akuna CapitalMediumSoftware EngineerImplement a two-user communications handler
This question evaluates skills in stateful resource management, API and abstraction design, custom exception handling, and input validation for enforcing a single-active connection between two users.
System DesignOnline Assessment - Akuna CapitalMediumSoftware EngineerSolve swaps, graph paths, and movie DP
This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Solve swaps, graph paths, and movie DP states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsOnline Assessment - Akuna CapitalMediumSoftware EngineerSolve three C++ algorithmic tasks
This interview question evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer for Solve three C++ algorithmic tasks states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsOnline Assessment - Akuna CapitalMediumSoftware EngineerTrace code and find frequent character
Trace code and find frequent character evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsOnline Assessment - Akuna CapitalMediumData EngineerWrite February Resource Usage Query
This question tests the ability to join multiple tables, handle date filtering with range conditions, and perform grouped aggregations to calculate average metrics across different resource categories.
Software Engineering FundamentalsOnline AssessmentSQLAggregationJoins - AmazonMediumSoftware EngineerAdd One Source to Minimize Grid Inconvenience
Minimize the worst inconvenience in a binary grid by adding one colored source. Movement is allowed in eight directions, and the solution must handle grids that begin with no source at all.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerBuild the Largest Available Sequence
This problem tests your ability to use a greedy approach combined with a frequency map to construct the lexicographically largest sequence under specific constraints.
Coding & AlgorithmsOnline AssessmentGreedyPriority QueueFrequency Map - AmazonMediumSoftware EngineerChoose Work-Style Assessment Responses
Tests a candidate's ability to navigate forced-choice and situational judgment items in an automated work-style assessment, balancing trade-offs between competing leadership values such as speed versus quality, autonomy versus consensus, and maintaining internal consistency.
Behavioral & LeadershipOnline AssessmentAmazon OAWork Style AssessmentBehavioral - AmazonHardSoftware EngineerCircular Drone Hub Delivery Route
This question evaluates a candidate's ability to work with circular array structures and prefix sums to compute shortest distances on a ring topology. It tests practical coding skill in efficiently handling wraparound arithmetic and cumulative sums, a common pattern in algorithm interviews assessing array manipulation and optimization under scale constraints.
Coding & AlgorithmsOnline Assessment - AmazonMediumProduct ManagerCommunicating Top-Down Change
Practice communicating top-down operational change across peer managers, direct-report managers, and front-line employees. The solution covers safety, efficiency, cost goals, audience-specific messaging, pilots, feedback loops, metrics, guardrails, and sustainment.
Behavioral & LeadershipOnline Assessment - AmazonMediumSoftware EngineerCompute delay times in priority array
This question evaluates algorithmic efficiency in array processing, specifically reasoning about nearest-smaller relationships and the use of auxiliary structures to achieve subquadratic performance.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerCompute maximum distinct-product pickup days
This question evaluates a candidate's understanding of greedy and resource-allocation strategies along with combinatorial reasoning to maximize operations under discrete constraints.
Coding & AlgorithmsOnline Assessment - AmazonEasySoftware EngineerCompute minimal operations and optimal server pairing
This two-part question evaluates array manipulation and optimization skills—specifically range-update minimization to enforce a nondecreasing sequence and greedy pairing/matching to maximize summed primary resources—testing algorithm design, complexity reasoning, and constraint handling.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerCompute reachability and minimal-time same-type scheduling
This prompt evaluates integer reachability and invariant reasoning via repeated additive transformations (testing number-theoretic reachability and state-space analysis) alongside resource-aware scheduling and grouping logic for minimizing completion time under type and memory constraints, and it falls under the Coding & Algorithms domain.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerCount Four-Neighbor Islands in a Binary Matrix
Count four-neighbor islands in a binary matrix and consider the connectivity state needed when rows arrive as a stream.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerCount partitions and equal-cost packages
This question evaluates string-processing and combinatorial counting skills, including tracking distinct-character occurrences across contiguous partitions and using frequency-based pairing logic on arrays to form equal-cost packages.
Coding & AlgorithmsOnline Assessment - AmazonHardSoftware EngineerDebug Failing Tests in a Django Movie Search and Filter API
Debug an existing Django movie catalog API whose automated tests fail, covering URL routing, query parameter handling, queryset filters on genre, director, writer, rating and year, result ordering with tie-breakers, and HTTP 500 errors. It tests a systematic, layer-by-layer debugging process under a time limit.
Software Engineering FundamentalsOnline Assessment - AmazonMediumSoftware EngineerDebug Watch List Movie Operations
This question evaluates backend debugging, RESTful API semantics, data validation and integrity, persistence behavior, and correct HTTP status and error-response handling for watch-list movie operations.
Software Engineering FundamentalsOnline Assessment - AmazonHardSoftware EngineerDebug a Layered Book Search Service Against Five Search Rules
Given a layered bookstore search backend with planted bugs, write failing tests for substring matching, scope selection, case-insensitivity, multi-key ordering and visibility, then locate and fix every defect without changing the API contract. Tests test-first debugging across layers and query design.
Software Engineering FundamentalsOnline Assessmentdebuggingtestingsearch - AmazonMediumSoftware EngineerDebug a Node.js car-rental backend: leaked cars, missing new cars, lost edits
An unfamiliar Node.js car-rental backend with API documentation and failing preset tests has three independent bugs: the My Cars list shows other users' cars, newly added cars never appear, and edits vanish after a refresh. The question tests systematic debugging, ownership checks across endpoints, and confirming that writes really persist.
Software Engineering FundamentalsOnline Assessment - AmazonMediumSoftware EngineerDebug a Test-Driven C++ Project
Tests your ability to design and implement a sliding-window rate limiter with deduplication and state cleanup, reflecting common logic and edge-case errors encountered when debugging test-driven C++ systems.
Software Engineering FundamentalsOnline AssessmentSliding WindowDesignHash Table - AmazonMediumSoftware EngineerDesign a TTL-Aware LRU Cache Without Full Expiration Scans
Design a TTL-aware LRU cache with synchronized access, capacity eviction, and expiration heaps or timing wheels instead of full-table scans.
Software Engineering FundamentalsOnline Assessment - AmazonMediumSoftware EngineerDesign faster delay-time computation
This question evaluates a candidate's ability to design efficient array algorithms and appropriate data structures for nearest-smaller-element queries, assessing performance, correctness with duplicates, and scalability to large inputs.
Coding & AlgorithmsOnline Assessment - AmazonMediumSoftware EngineerDetermine Rounds for Star Substring Threshold
This question evaluates string-processing and algorithmic problem-solving skills, including handling incremental updates, counting substrings impacted by character replacements, and performance-aware simulation.
Coding & AlgorithmsOnline Assessment - AmazonMediumData ScientistDiagnose MySQL joins and GROUP BY/HAVING errors
This question evaluates mastery of SQL join semantics (LEFT, RIGHT, FULL OUTER emulation, CROSS), NULL equality and duplicate handling, GROUP BY/HAVING behavior under ONLY_FULL_GROUP_BY, aggregation result shaping and type/format conversions in the Data Manipulation (SQL/Python) domain.
Data Manipulation (SQL/Python)Online Assessment - AmazonHardSoftware EngineerDiagnose Return Eligibility Scoring Bugs
This question evaluates debugging and root-cause analysis skills related to scoring logic, data integrity, feature engineering, and system reliability in return-eligibility services.
Software Engineering FundamentalsOnline Assessment - AmazonHardData ScientistDrive stakeholder alignment under trade-offs
This question evaluates competency in cross-functional stakeholder alignment, trade-off analysis, data governance and security risk assessment, executive communication, and program decision-making within a technical product context.
Behavioral & LeadershipOnline Assessment - AmazonMediumSoftware EngineerDrone Circular Route — Minimum Total Travel Cost
This problem tests your ability to solve a variation of the Traveling Salesman Problem using bitmask dynamic programming to optimize route costs in a small, weighted graph.
Coding & AlgorithmsOnline AssessmentDynamic ProgrammingBitmaskingGraph Theory - AmazonHardSoftware EngineerEvaluate actions in Amazon simulation
Evaluate actions in Amazon simulation evaluates behavioral evidence, ownership, communication, trade-offs, and measurable outcomes in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Behavioral & LeadershipOnline Assessment - AmazonMediumSoftware EngineerExplain conflict, ownership, and AI use
An Amazon-style behavioral interview prep set for early-career software engineers, spanning multiple conflict-resolution stories, deep root-cause investigation, ownership beyond your formal role, and responsible use of generative AI. It teaches a STAR-plus-reflection framework, what each prompt is really evaluating, and how to stay consistent under heavy follow-up questioning.
Behavioral & LeadershipOnline Assessment
Akuna Capital
Amazon