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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
- Companies
- 11
- Topics
- 8
- Languages
Showing 931–960 of 5874 results
- AppleMediumSoftware EngineerSolve linked list, grid BFS, and median queries
This problem tests your ability to manipulate linked list pointers in-place, perform a multi-source Breadth-First Search on a grid, and maintain a sorted structure to retrieve medians efficiently.
Coding & AlgorithmsOnsiteLinked ListBFSHeaps - AppleMediumSoftware EngineerSolve mixed coding tasks from interviews
This question evaluates binary tree traversal and leaf detection, calendrical date arithmetic and palindrome checking, discrete-time edge-detection/stateful sequence processing, and implementation of comparison-based sorting; category/domain: Coding & Algorithms. It is commonly asked to assess correctness and edge-case handling (e.g.
Coding & AlgorithmsTechnical Screen - AppleEasySoftware EngineerSolve three easy algorithm problems
This multi-part prompt evaluates proficiency in fundamental algorithmic concepts including sorted array handling, single-transaction optimization in time-series data, and bracket-sequence validation, measuring understanding of array and string manipulation, common data structures, algorithmic complexity, and edge-case reasoning.
Coding & AlgorithmsTechnical Screen - AppleMediumSoftware EngineerSort and merge string lists by length
This question evaluates understanding of sorting algorithms, stability, merging strategies, and time/space complexity analysis when ordering strings by length, and is categorized under Coding & Algorithms.
Coding & AlgorithmsTechnical Screen - AppleEasySoftware EngineerStore Open-Hours Query: Weekdays, Split Shifts and Overnight Windows in Java
A progressive Java coding exercise that asks whether a store is open at a given time as its schedule grows from one daily window to selected weekdays, several windows per day, and overnight windows that cross midnight and wrap from Sunday to Monday. It tests time modeling, boundary handling, and keeping evolving code readable.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerTime-to-Live Token Manager With Renewal and a Heavy Concurrent Read/Write Follow-up
Implement a token manager in which each token expires a fixed time-to-live after it is generated or renewed, renewals extend only unexpired tokens, and a query counts live tokens. The follow-up asks how to keep it correct and fast under heavy concurrent reads and writes.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerTroubleshoot a Failing Kubernetes Pod: Where to Start and What to Check
Explain how to troubleshoot a Kubernetes pod that has a problem, starting from its status, container states and events. Tests mapping Pending, ImagePullBackOff, CrashLoopBackOff, OOMKilled and not-Ready states to likely causes, using logs, debug containers and node checks, and separating mitigation from root cause.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerUnit Ratio Queries Across Independent Unit Families with Modular Answers
A graph coding problem: given multiplicative conversion factors between units that split into independent families, answer queries for how many units of one unit equal one unit of another, returning the ratio modulo a prime or -1 when the units cannot be converted. It tests graph traversal over a forest and modular arithmetic.
Coding & AlgorithmsTechnical Screen - AppleMediumSoftware EngineerValidate and Assess Performance Benchmarks
Assess QA benchmark validity using comparable baselines, measurement variation, practical impact, and clear ownership of regression thresholds and known issues.
Software Engineering FundamentalsOnsite - AppleMediumSoftware EngineerVertical Order Traversal of a Binary Tree
This problem tests your ability to map tree nodes to a 2D coordinate system and group them based on their horizontal distance from the root, followed by specific sorting criteria.
Coding & AlgorithmsOnsiteBinary TreeHash TableSorting - AppleMediumSoftware EngineerWalk Through Your Hardest Debugging Investigation
This question assesses your systematic problem-solving process, technical depth, and ability to learn from high-pressure production incidents.
Behavioral & LeadershipOnsiteBehavioralDebuggingProduction - AppleMediumSoftware EngineerWork Productively with Someone Who Disagrees
This question assesses a candidate's ability to navigate professional conflict by prioritizing team objectives over personal ego and maintaining effective working relationships.
Behavioral & LeadershipOnsiteCommunicationConflict ResolutionCollaboration - AppleEasySoftware EngineerWrite a Usage Example for a Resource-Owning C++ Class and Explain Its Semantics
A C++ internship screen exercise: read an unfamiliar class that owns a heap array and write an example program showing callers how to use it correctly. It tests code comprehension and C++ fundamentals such as RAII, deleted copy operations, move semantics, noexcept, explicit constructors and const-correctness.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerZero out duplicates and sort an array
This question evaluates proficiency in array manipulation, duplicate handling, and custom sorting logic with attention to time and space complexity, and it falls within the Coding & Algorithms domain.
Coding & AlgorithmsTechnical Screen - Applied IntuitionMediumSoftware EngineerBuild an Ingestion Service and Timestamp-Indexed Query API for MCAP Driving Logs
A hands-on build exercise over recorded vehicle drive logs stored in MCAP, with Protobuf-encoded camera and location messages. The candidate ingests the runs, designs storage and a time index, exposes APIs to list runs and query messages by timestamp, then demos the result and explains how they worked with an AI coding assistant.
Software Engineering FundamentalsOnsite - Applied IntuitionMediumSoftware EngineerBuild and present a minimal vehicle log playback app from S3 data in two hours
Given two hours, an AI coding assistant and an S3 bucket of unfamiliar vehicle log data, build a minimal 3D log playback app and then present it in 30 minutes. The exercise tests data exploration, tight scoping, verifying AI-generated code, and explaining trade-offs and future work clearly.
Software Engineering FundamentalsOnsite - Applied IntuitionMediumSoftware EngineerCompress vertices into uniques and indices
This question tests the ability to efficiently identify unique elements in a sequence while maintaining their original relative order, mapping them to integer indices to compress a large dataset.
Coding & AlgorithmsOnsiteHashingData StructuresOptimization - Applied IntuitionMediumSoftware EngineerDesign Parsing Boundaries for Interdependent Message Types
Design parsing and type-resolution boundaries for interdependent message definitions, clarifying schema versus encoded input, forward references, recursion, and validation.
Software Engineering FundamentalsTechnical Screen - Applied IntuitionMediumSoftware EngineerDesign Sensor Data Processing With AI-Assisted Implementation
Design an end-to-end ingestion, validation, and storage pipeline for high-frequency sensor telemetry from autonomous vehicle fleets. The focus is on handling raw versus derived data, schema modeling, fast time-range queries, and robust validation.
System DesignTechnical ScreenTime SeriesData PipelineIoT & Robotics - Applied IntuitionMediumSoftware EngineerDesign a C++ Ring Buffer for Producer-Consumer Use
This problem tests your understanding of multi-threaded synchronization primitives, memory ordering, and circular buffer logic in a low-latency environment.
Software Engineering FundamentalsTechnical ScreenC++ConcurrencyLock-free - Applied IntuitionMediumSoftware EngineerDesign a Streaming TLV Message Reassembler in C
Implement an in-memory reassembler in C that reconstructs out-of-order chunked TLV messages, validates chunk bounds and duplicates, and detects message completion.
Software Engineering FundamentalsTechnical ScreenCSystems ProgrammingNetworking - Applied IntuitionMediumSoftware EngineerDesign a Transactional Key-Value Store
This problem tests the ability to design an in-memory key-value store that supports nested transactions, including atomic commits, rollbacks, and precise state management across layers.
Software Engineering FundamentalsTechnical ScreenData StructuresSystem DesignTransactions - Applied IntuitionHardSoftware EngineerDesign a job scheduler
This question evaluates competency in designing scalable, durable distributed job schedulers, covering multi-tenant architecture, queuing and metadata persistence, execution semantics, idempotency, retries/dead-lettering, failure handling, and observability.
System DesignOnsite - Applied IntuitionEasySoftware EngineerDesign a mini compiler/interpreter
This question evaluates understanding of language design and implementation skills, including lexical analysis, parsing into an AST, expression evaluation with operator precedence and unary operators, variable assignment semantics, and runtime error reporting.
Software Engineering FundamentalsOnsite - Applied IntuitionMediumSoftware EngineerDesign a nested transaction store
This question evaluates understanding of transactional state management, nested transaction semantics, scope resolution, and data-structure design for an in-memory key–value store.
Coding & AlgorithmsOnsite - Applied IntuitionMediumSoftware EngineerDesign a real-time 3D playback system for recorded vehicle logs
Design a system that plays recorded vehicle log data back as a smooth, seekable 3D scene without downloading the whole log first. It tests chunked, time-indexed streaming, prefetching and caching around the playhead, aligning data streams of different rates, and handling heavy sensor data at scale.
System DesignOnsite - Applied IntuitionMediumSoftware EngineerDesign a simulator to replay left-turn videos
This question assesses the ability to architect a high-throughput simulation system capable of retrieving, syncing, and replaying synchronized sensor data streams for autonomous vehicle testing.
System DesignOnsiteData StreamingStorage OptimizationLatency - Applied IntuitionMediumSoftware EngineerDesign a transactional in-memory key–value store
This question evaluates understanding of transactional state management, nested transaction semantics, scope shadowing, and efficient data-structure design for an in-memory key–value store, assessing competency in correctness, consistency, and algorithmic complexity under nested BEGIN/ROLLBACK/COMMIT operations.
Coding & AlgorithmsTechnical Screen - Applied IntuitionHardSoftware EngineerDiscuss productionizing event-timeout detector
Discuss productionizing event-timeout detector 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 - Applied IntuitionMediumSoftware EngineerEvaluate Dependent Variable Assignments
Evaluate a list of variable assignment statements where variable values can depend on variables defined later in the input. The problem tests expression parsing, cycle detection, dependency resolution via topological ordering or memoized depth-first search, and deep recursion handling.
Coding & AlgorithmsTechnical Screengraphtopological-sortparsing
Apple
Applied Intuition