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Software Engineering Fundamentals 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
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- 546
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- 11
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- 8
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Showing 31–60 of 96 results
- AqrMediumData ScientistAutopilot for a Flappy Bird-Style Game Across Maps with Varying Pipe Gaps
Build an autopilot for a Flappy Bird-style game that decides on every step whether the bird should flap so it flies through pipe gaps whose heights vary across unseen maps. Tests modeling the game's physics, planning ahead under a time budget, collision handling, and generalizing beyond a single map.
Software Engineering FundamentalsOnline Assessment - AqrMediumData ScientistAutopilot for a Submarine Navigating Shifting Reef Gaps
Write a controller that decides, on every tick, whether a mini-submarine should blow ballast to rise through reef-pair gaps of varying heights on unseen maps, using a short deterministic lookahead search.
Software Engineering FundamentalsOnline Assessmentsimulationsearchgame-ai - BitkernelMediumSoftware EngineerAnalyze TCP three-way handshake states
This question evaluates understanding of TCP connection establishment and the TCP state machine, testing recognition of correct state transitions during the three-way handshake and related transport-layer behavior.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerChoose best prompt for AI code debugging
This question evaluates a candidate's competency in prompt engineering and AI-assisted debugging, focusing on structuring diagnostic information, providing error context, and communicating expected versus actual behavior.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerClassify concurrency anomaly between two transactions
This question evaluates proficiency in database concurrency control and transaction isolation within the Software Engineering Fundamentals domain, focusing on identifying concurrency anomalies that affect data integrity and update correctness.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerCount binary search steps for specific keys
This question evaluates understanding of binary search mechanics, counting comparisons during a specific execution, and competency in algorithmic analysis and control-flow reasoning.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerEvaluate C for-loop execution count
This question evaluates understanding of C expression evaluation and control-flow semantics, focusing on how assignment expressions interact with loop conditions and variable updates.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerFind minimum two’s-complement value with three ones
This question evaluates understanding of two's-complement representation and bit-level reasoning, specifically how constrained bit counts affect signed 8-bit integer values.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerIdentify incorrect HTTP status code description
This question evaluates understanding of HTTP status code semantics, including the meanings of response classes and individual status numbers, testing knowledge of web protocols and HTTP behavior within Software Engineering Fundamentals.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerOrder SQL query logical processing steps
This question evaluates a candidate's understanding of SQL-92 logical query processing order and relational query semantics, testing competency in reasoning about clause evaluation, aggregation, and filtering.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerSolve cups logic puzzle with one true statement
This question evaluates logical reasoning and propositional-logic skills, assessing the ability to analyze mutually dependent statements and derive consistent conclusions within a constraint-satisfaction context.
Software Engineering FundamentalsOnline Assessment - BitkernelMediumSoftware EngineerTrace first pass of heap sort
This question evaluates understanding of heap sort and heap operations, specifically max-heap construction, root extraction, and subsequent heapify steps during an in-place array sort.
Software Engineering FundamentalsOnline Assessment - BnsfMediumSoftware EngineerImplement CRUD API and tests
This question evaluates proficiency in implementing RESTful CRUD APIs, correct HTTP semantics and content negotiation (text/plain request bodies with JSON responses), robust error handling, and the ability to design unit tests from a function specification to cover edge cases and failure modes.
Software Engineering FundamentalsOnline Assessment - Capital OneMediumSoftware EngineerDesign Nearest-Pickup Search with Time
Design efficient nearest-pickup search for latitude-longitude data and a time-aware extension while clarifying distance, ties, result order, and temporal ranking.
Software Engineering FundamentalsOnline Assessment - CitadelMediumSoftware EngineerRefactor a Correct but Quadratic C++ Routine Under a Microsecond Budget
Optimize an inefficient, quadratic tree-resolution routine into a linear-time, cache-friendly implementation suitable for ultra-low-latency execution.
Software Engineering FundamentalsOnline AssessmentTreePerformance OptimizationGraph Traversal - CoinbaseMediumSoftware EngineerBuild Task Management Through Records, Search, Assignment, and Completion
Implement an in-memory task management system that tracks task lifecycles, assignments, and deadlines with efficient indexing and querying. Tests data structure design, state management, and multi-field sorting.
Software Engineering FundamentalsOnline Assessmentdata-structureshash-tablesorting - CoinbaseHardSoftware EngineerDesign a Timestamped Cloud Credit Ledger with Rebates, Merges, and History
Design an in-memory cloud credit ledger that processes top-ups, charges with delayed deterministic rebates, account merges with canonical alias resolution, historical balance lookups, and spending leaderboards.
Software Engineering FundamentalsOnline AssessmentData StructuresDesignHeap - CoinbaseMediumSoftware EngineerDesign a task management system with TTL
This question evaluates the ability to design in-memory data models and algorithms for time-based task assignment semantics, including TTL-based expiration, per-user quotas, priority-based listing, and correct handling of multiple concurrent assignments and completion rules.
Software Engineering FundamentalsOnline Assessment - ComposioMediumSoftware EngineerGenerate a Semantic Dependency Graph from Tool Schemas
Design an algorithm to construct an explainable dependency graph between API tools by matching output and input schemas and identifying unresolved requirements.
Software Engineering FundamentalsOnline AssessmentGraph AlgorithmsData ProcessingSchema Matching - CrestaMediumSoftware EngineerSearch a Directory Tree for a File and Return Its Absolute Path in Python
Write a Python function that searches a directory and all of its subdirectories for a file matching a requirement and returns the file's absolute path. It tests practical use of os and pathlib, deterministic handling of multiple or missing matches, relative roots, symbolic links and unreadable directories.
Software Engineering FundamentalsOnline Assessment - DoorDashMediumSoftware EngineerDesign an API for pay computation with retries
Assesses the candidate's ability to design robust HTTP APIs covering endpoint modeling, request/response schemas, datetime formats, idempotency strategies, retry semantics, validation/error codes, and observability for pay-computation services.
Software Engineering FundamentalsOnline Assessment - Epic SystemsHardSoftware EngineerSolve Timed Logical and Quantitative Reasoning Cases
Implement a deduction engine that evaluates whether target query statements are definitely true, definitely false, or cannot be determined, given a set of observed facts and unidirectional logical implications.
Software Engineering FundamentalsOnline AssessmentGraph AlgorithmsLogic DeductionBFS/DFS - FidelityMediumSoftware EngineerWrite good tests and define integration tests
Write good tests and define integration tests evaluates engineering fundamentals, trade-offs, examples, pitfalls, and operational implications in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Software Engineering FundamentalsOnline Assessment - GoogleMediumSoftware EngineerDesign a multi-timer using single underlying timer
This question evaluates a candidate's ability to implement timer scheduling, resource multiplexing, and concurrency control using constrained system primitives, testing understanding of timers, event handling, data structures, and correctness under race conditions.
Software Engineering FundamentalsOnline Assessment - HackerRankMediumSoftware EngineerDebug React Sorting, Persistence, Routing, and Accessibility
This problem tests your ability to identify and rectify common React anti-patterns, including state mutations, improper side-effect handling, and accessibility failures in a data-driven application.
Software Engineering FundamentalsOnline AssessmentReactJavaScriptAccessibility - HeadlandsMediumData ScientistC++ Sliding-Window Mean of a Float Array With Inf, -Inf and NaN Handling
Implement an O(n) sliding-window mean over a 32-bit float array containing IEEE-754 special values (+inf, -inf, NaN) without poisoning subsequent windows or suffering numerical drift.
Software Engineering FundamentalsOnline Assessmentcppsliding-windowieee-754 - IBMMediumSoftware EngineerDebug and Harden a Ticketing Backend API
Implement and harden an in-memory ticket service backend to handle deterministic cursor pagination, idempotent reservations, cache invalidation, and oversell prevention.
Software Engineering FundamentalsOnline AssessmentAPI DesignCachingPagination - InstacartMediumSoftware EngineerAdd Backend Search and Filters to the Items API of a Library Lending System
Implement and test backend search, multi-attribute filtering, sorting, and pagination logic for a library lending system's items catalog.
Software Engineering FundamentalsOnline AssessmentAPI DesignData FilteringPagination - InstacartMediumSoftware EngineerAdd Hold-Available and Loan Due-Date Notifications to a Library Lending System
Tests domain modeling, queue management, and idempotent notification triggering for an event- and time-driven library lending workflow.
Software Engineering FundamentalsOnline AssessmentObject-Oriented DesignState ManagementData Structures - InstacartMediumBackend EngineerDebug Metrics Computed Before Filtering
Debug a metrics endpoint whose summary is calculated before user filters are applied even though its rows are filtered correctly. Trace the data lineage, aggregate over the full matched population before pagination, preserve security scoping, and add unit and endpoint regression tests.
Software Engineering FundamentalsOnline Assessment
Aqr
Capital One
Citadel
Coinbase
Cresta
DoorDash
Fidelity
Google
IBM
Instacart