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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 151–180 of 1208 results
- AppleHardSoftware EngineerImplement a Thread-Safe Event Tracker Over a Sliding Time Window
Implement a thread-safe in-memory event tracker that records events and reports the events and their count within a sliding time window. Tests time-ordered storage with amortized eviction, window boundary semantics, lock scope and clock choice, out-of-order events, and memory under high event rates.
Software Engineering FundamentalsOnsite - AppleMediumAccessories Software QA EngineerImprove QA Benchmarks, Regression Tests, and HPC Resource Use
Explain functional regression testing, reproducible performance benchmarks, and how to reduce shared HPC resource use without weakening test coverage.
Software Engineering FundamentalsOnsite - AppleMediumSoftware EngineerImprove chip performance without process advances
This question evaluates understanding of digital architecture, microarchitecture, and logic‑level techniques for improving chip performance without process advances, along with competence in performance/power/area (PPA) trade‑off analysis and arithmetic block design.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerLRU Cache with Fewer Recency Writes and Concurrent Access
Implement a fixed-capacity least-recently-used cache with constant-time get and put, then discuss two follow-ups: cutting the shared-state writes that every read causes when it updates recency, and making the cache safe and fast under concurrent access, including how eviction order changes.
Software Engineering FundamentalsOnsite - AppleHardSoftware EngineerMake tree iterators safe under concurrency
This question tests the ability to design a thread-safe iterator for a binary search tree (BST) that remains consistent even if the underlying tree structure is modified during iteration.
Software Engineering FundamentalsTechnical ScreenConcurrencyTreesIterators - AppleMediumSoftware EngineerOptimize QA Benchmarks and Shared HPC Usage
Optimize QA benchmark turnaround and shared HPC usage by profiling execution, controlling resources, and separating runtime savings from faster reporting.
Software Engineering FundamentalsOnsite - AppleEasySoftware EngineerParse and Summarize HTTP Access Logs
Parse a strict HTTP access-log format and summarize valid requests, client errors, server errors, invalid lines, and failure percentage. The prompt tests full-field validation, precise metric denominators, status boundaries, streaming aggregation, and privacy-safe diagnostics.
Software Engineering FundamentalsTechnical Screen - AppleMediumSoftware EngineerPin Down a Vague HTML Parser Prompt, Build the Element Tree, and Query It with DFS
A coding exercise in which the HTML parser prompt is deliberately vague, so the candidate must first pin down input, output and edge cases with concrete examples. It tests building a tree from nested markup in one pass, handling void and malformed tags, and answering a query with a depth-first traversal.
Software Engineering FundamentalsOnsite - AppleMediumSoftware EngineerReduce False Failures and Classify QA Outcomes
Reduce regression false failures with reviewed acceptance rules, then classify causes and severity without confusing test categories with observed outcomes.
Software Engineering FundamentalsOnsite - AppleMediumSoftware EngineerReturn the First Successful Result from Parallel API Calls Under a Global Timeout
Implement a function that runs several slow, failure-prone backend API calls concurrently and returns the first successful result within a single overall timeout. It tests concurrency primitives, deadline handling, reporting when every call fails, and cleaning up calls that are still in flight, using threads, futures, or async code.
Software Engineering FundamentalsTechnical 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 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 - AppleHardMachine Learning EngineerWalk Through an Agentic PDF Evaluation Codebase
This question tests your ability to navigate, critique, and extend a modular codebase designed for evaluating agentic PDF processing pipelines, focusing on evaluation metrics and robust system architecture.
Software Engineering FundamentalsTechnical ScreenAgentic-WorkflowsEvaluationLLM-Systems - 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 - 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 IntuitionMediumMachine Learning EngineerDesign Ordered CUDA Reduction
This question evaluates understanding of parallel GPU programming, deterministic reduction ordering, and numerical stability in floating-point arithmetic, within the domain of parallel algorithms, GPU/CUDA programming, and numerical computing for a Software Engineering Fundamentals / Machine Learning Engineer role.
Software Engineering FundamentalsTechnical Screen - 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 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 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 EngineerLocate Cars with a Boolean Square-Scan API
Implement and analyze a quadtree-based search algorithm that locates all vehicles on a 2D grid using a Boolean square-scan API.
Software Engineering FundamentalsTechnical Screenrecursiondivide-and-conquerquadtree - Applied IntuitionMediumSoftware EngineerProtobuf-Style Schema: Look Up Message Sizes and Field Types, Then Parse the Schema
Implement size and field-type lookups over a simplified protobuf-style schema in which messages embed other messages, then write the parser that builds the schema from raw text. Tests schema data modeling, handling of nested, cyclic and unknown message references, clear error behavior, and robust parsing of proto-like definitions.
Software Engineering FundamentalsTechnical Screen - Applied IntuitionHardSoftware EngineerScale a Grid Fire-Spread Simulation Past What Fits in Memory
Scale a working small-grid cellular-automaton fire-spread simulation to a dense multi-million-cell board that no longer fits in memory, by computing each generation with a three-row sliding window read from one file and streamed into another. Tests memory estimation and disk-backed algorithm redesign without changing the core update rule.
Software Engineering FundamentalsTechnical Screensimulationstreamingfile-io - AqrMediumData ScientistAutopilot a Thruster Drone Through Randomized Canyon Walls
Write a per-tick controller that fires a drone's thruster so it clears wall openings on unseen, randomized canyons. Tests modeling deterministic physics, depth-limited lookahead search, and choosing a horizon that generalizes.
Software Engineering FundamentalsOnline Assessmentsimulationsearchgame-ai - 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
Apple
Applied Intuition
Aqr