System designLast seen Oct 2026
Design a Distributed Cache with an Index Database
Keep a durable key index consistent with evictable cached blobs through concurrent updates, expiry, and cache-node failure.
Open practiceApple interview practice
Apple technical interview practice for coding and system design. Start with verified evidence.
Practice from 73 Apple-tagged public coding problems, organized only by the stage, topic, difficulty, and recency metadata FastPrep can verify. The broader public catalog also includes 20 system-design exercises, 3 low-level-design exercises.
- Catalog
- 96 public practice assets (73 coding)
- Start here
- Use the stage named in your invitation
- Evidence
- OA · Phone · Onsite metadata, shown in context
OA practice path
Online Assessment
Build a timed implementation rhythm from prompt to edge cases. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
APApple | Merge IntervalsArraySorting | Medium | 3 public reportsLast reported Mar 2021 | Practice |
APApple | Merge Two Strings by Maximum Boundary OverlapString | Medium | 2 public reportsLast reported Sep 2026 | Practice |
APApple | Collect Letters Along a Unique Grid PathMatrixSimulation | Easy | 1 public reportLast reported Aug 2025 | Practice |
APApple | Maximum Weight in Two BagsArrayDynamic Programming | Medium | 1 public reportLast reported Aug 2025 | Practice |
APApple | Ignore SectionsArraySimulation | Easy | 1 public reportLast reported Mar 2024 | Practice |
APApple | Gas Station Circular TourArrayGreedy | Medium | 1 public reportLast reported Nov 2021 | Practice |
APApple | House Robber IIArrayDynamic Programming | Medium | 1 public reportLast reported Nov 2021 | Practice |
APApple | Clone an Undirected Graph StateGraphHash Table | Medium | 1 public reportLast reported Mar 2021 | Practice |
APApple | Longest Increasing Subsequence LengthArrayBinary Search | Medium | 1 public reportLast reported Feb 2021 | Practice |
APApple | Maximum Later DifferenceArrayGreedy | Easy | 1 public reportLast reported Feb 2021 | Practice |
Phone practice path
Phone Screen
Practice solving while explaining assumptions, tradeoffs, and complexity. Problems are ranked by repeated public catalog sightings.
41 Apple-tagged Phone Screen problems available.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
APApple | Implement Hit CounterQueueDesign | Medium | 3 public reportsLast reported Oct 2026 | Practice |
APApple | Merge IntervalsArraySorting | Medium | 3 public reportsLast reported Mar 2021 | Practice |
APApple | Producer-Consumer QueueQueueDesign | Medium | 2 public reportsLast reported Oct 2026 | Practice |
APApple | LRU CacheHash TableDesign | Medium | 2 public reportsLast reported Oct 2026 | Practice |
APApple | Count Islands in a Binary GridArrayMatrix | Medium | 2 public reportsLast reported Aug 2026 | Practice |
APApple | Coin Change IIArrayDynamic Programming | Medium | 2 public reportsLast reported Aug 2025 | Practice |
APApple | Count Nodes in a ChainLinked ListTwo Pointers | Easy | 1 public reportLast reported Oct 2026 | Practice |
APApple | Maintain a Consistent-Hashing RingDesignBinary Search | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Run-Length DecodingStringSimulation | Easy | 1 public reportLast reported Oct 2026 | Practice |
APApple | Reusable Cyclic BarrierDesign | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Topological OrderingGraphHeap | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Customer Order Count Distribution by CountryDatabase | Easy | 1 public reportLast reported Oct 2026 | Practice |
APApple | iPhone Model Sales Share by CountryDatabase | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Query Weekly Store Opening HoursIntervalsSorting | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Top Five Countries by Product RevenueDatabase | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Days Until Poisoned Plants StabilizeMatrixBreadth-First Search | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Design Authentication ManagerDesignHash Table | Medium | 1 public reportLast reported Sep 2026 | Practice |
APApple | Unit Conversion Across Independent FamiliesGraphBreadth-First Search | Medium | 1 public reportLast reported Sep 2026 | Practice |
APApple | First Successful Concurrent API Result Before a TimeoutArraySimulation | Easy | 1 public reportLast reported Sep 2026 | Practice |
APApple | Canonical N-Ary Tree CodecTreeDepth-First Search | Medium | 1 public reportLast reported Sep 2026 | Practice |
Onsite practice path
Onsite
Practice complete solutions and defend the choices behind them. Problems are ranked by repeated public catalog sightings.
| Company | Problem | Difficulty | Public evidence | Action |
|---|---|---|---|---|
APApple | Implement Hit CounterQueueDesign | Medium | 3 public reportsLast reported Oct 2026 | Practice |
APApple | LRU CacheHash TableDesign | Medium | 2 public reportsLast reported Oct 2026 | Practice |
APApple | Coin Change IIArrayDynamic Programming | Medium | 2 public reportsLast reported Aug 2025 | Practice |
APApple | FIFO Mutex Operation TraceQueueDesign | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Topological OrderingGraphHeap | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Parse Nested HTML into a TreeStringStack | Medium | 1 public reportLast reported Oct 2026 | Practice |
APApple | Palindrome Match PercentageStringTwo Pointers | Easy | 1 public reportLast reported Sep 2026 | Practice |
APApple | Binary Tree Nodes at Distance KTreeBreadth-First Search | Medium | 1 public reportLast reported Aug 2026 | Practice |
APApple | BST to Sorted Circular Doubly Linked ListTreeLinked List | Medium | 1 public reportLast reported Aug 2026 | Practice |
APApple | Classify Natural-Month Distance Between DatesParsingMath | Medium | 1 public reportLast reported Aug 2026 | Practice |
APApple | Copy a Random-Pointer List in Constant SpaceLinked ListHash Table | Medium | 1 public reportLast reported Aug 2026 | Practice |
APApple | Top K Closest Pairs in a Sorted ArrayArraySorting | Medium | 1 public reportLast reported Aug 2026 | Practice |
APApple | Extract a Register Bit FieldBit Manipulation | Easy | 1 public reportLast reported Jul 2026 | Practice |
APApple | Merge Two Sorted Linked ListsLinked ListTwo Pointers | Easy | 1 public reportLast reported Jul 2026 | Practice |
APApple | Product Except Self With ZerosArrayPrefix Sum | Medium | 1 public reportLast reported Jul 2026 | Practice |
APApple | Subset Sum PossibleDynamic ProgrammingArray | Medium | 1 public reportLast reported Jul 2026 | Practice |
APApple | Corresponding Node in a Cloned TreeTreeDepth-First Search | Medium | 1 public reportLast reported Nov 2021 | Practice |
APApple | Middle of a Linked ListLinked ListTwo Pointers | Easy | 1 public reportLast reported Nov 2021 | Practice |
APApple | Two Eggs: Minimum Worst-Case DropsMathBinary Search | Medium | 1 public reportLast reported Nov 2021 | Practice |
APApple | Subarray Sum Equals KArrayPrefix Sum | Medium | 1 public reportLast reported Oct 2021 | Practice |
Current official guidance
Apple's technical work spans different specialties.
Apple's Software and Services careers page distinguishes areas such as apps, cloud infrastructure, operating systems, and software quality. It is role context, not a published universal interview sequence.
Primary sources checked .
- Use your team and role description to choose the relevant technical practice.
- This page does not claim to cover behavioral or hardware interviews.
01 · Preparation plan
Choose a technical track, then test the underlying assumptions.
Apple's public practice inventory spans coding fundamentals and service design. Prepare for the technical work relevant to your role without presenting the page as a behavioral, hardware, or universal full-loop guide. This is a suggested practice sequence, not the employer's interview process. Your invitation and recruiter guidance remain the source of truth.
- 01
Strengthen data-structure reasoning
Use graph, tree, or stateful data-structure practice to connect the chosen representation to a clear correctness argument.
- State the invariant for a traversal, lookup, or update.
- Test cycles, disconnected inputs, duplicate values, and empty structures where applicable.
- Explain why the approach meets the memory and runtime constraints.
- 02
Design for cross-device or service state
When a relevant design exercise is available, use synchronization, storage, or event collection to practice consistency and failure handling.
- Clarify what the client sees while devices or services are disconnected.
- Define conflict resolution and duplicate-event behavior.
- Explain storage, recovery, and observability tradeoffs before naming products.
- 03
Match preparation to the actual role
Turn the job description and recruiter guidance into a short technical study plan; a broad company label is not a substitute for team requirements.
- Choose one implementation exercise and one relevant design exercise if offered.
- Explain how your solution changes under the role's likely constraints.
- Use the next study block to close a specific technical gap from the role description.
02 · Broader technical practice
Practice beyond standalone coding questions.
These public Apple-tagged exercises cover additional technical formats. They are included only when a verified catalog record and a crawlable practice page both exist.
System designLast seen Oct 2026
Design a Centralized Log Ingestion and Search Platform
Design a multi-tenant platform that durably ingests structured logs and provides coherent recent-event search and exact keyword occurrence counts.
Open practiceSystem designLast seen Oct 2026
Design a Distributed Rate Limiter
Design a multi-tenant distributed limiter that smooths priority and regular traffic under versioned quotas, retries, and partial failure.
Open practiceSystem designLast seen Oct 2026
Design Consumer-Outage Backlog Recovery
Keep a durable event stream safe and recoverable when consumers stop while producers continue publishing.
Open practiceSystem designLast seen Oct 2026
Design Top-K News Articles in a Time Window
Rank the most-viewed news articles for a requested historical time window at large scale.
Open practiceSystem designLast seen Oct 2026
Design a Ticket Booking System
Design the catalog, availability, pricing, reservation, and payment path for a high-demand movie and event ticketing platform.
Open practiceSystem designLast seen Sep 2026
Design an Analytical Data Dashboard
Design a trustworthy dashboard platform that derives versioned metrics from event data and serves fast, reproducible slices.
Open practiceSystem designLast seen Sep 2026
Evolve a Read-Write Record Service
Evolve a single-database record API through measured read and write growth while preserving versioned updates, freshness, and an online migration path.
Open practiceSystem designLast seen Sep 2026
Design Multi-Data-Center Storage Demand Forecasting
Design a versioned forecasting platform that predicts daily storage demand across 100 data centers and produces useful uncertainty for newly launched centers.
Open practiceSystem designLast seen Sep 2026
Design Predictive File Storage-Tier Placement
Design an ML-backed control plane that predicts file access and safely places files in hot or archive storage to reduce cost without breaking retrieval.
Open practiceSystem designLast seen Aug 2026
Design a Multi-Version Configuration Service
Design a configuration registry with immutable versions, an explicit current version, and safe rollback.
Open practiceSystem designLast seen Aug 2026
Design Cross-Device Wallpaper Synchronization
Design responsive cross-device wallpaper state propagation and constrained resumable asset delivery.
Open practiceSystem designLast seen Aug 2026
Design a Mobile Application Event Collection API
Design a reliable, privacy-aware API that accepts mobile application events despite retries, offline clients, and evolving schemas.
Open practiceSystem designLast seen Aug 2026
Design an On-Prem Media Transfer for Cloud GPU Training
Design a secure, resumable pipeline that moves a 200 TB media corpus from on-premises storage into cloud object storage and continuously feeds a cloud GPU training cluster.
Open practiceSystem designLast seen Aug 2026
Design an ML Training and Deployment Platform
Design reproducible training, immutable model registration, and deployments to online and batch inference in a bounded multi-tenant platform.
Open practiceSystem designLast seen Aug 2026
Design a Multi-Device Photo Storage System
Design photo upload, download, multi-device synchronization, and hot/cold storage with metadata separated from immutable blobs.
Open practiceSystem designLast seen Aug 2026
Design an Online Voting Service
Design APIs and storage for creating bounded elections, accepting one eligible vote per voter, and publishing trustworthy results.
Open practiceLow-level designLast seen Jul 2026
Shared-Memory Single-Writer Single-Reader Channel
Design a bounded shared-memory message channel between two processes, with safe record ownership, FIFO delivery and explicit full, empty and drained outcomes.
Open practiceSystem designLast seen Jul 2026
Design a Large JSON and XML Transformation Service
Design a bounded-memory service that transforms a 300 GB JSON array on one 16 GiB, 8-core worker with durable job control and monitoring. Add a finite independent-record XML profile with explicit parser limits and restart context while preserving the JSON interface.
Open practiceSystem designLast seen Jul 2026
Design a Real-Time Category Leaderboard
Design category-partitioned leaderboards that ingest scores idempotently and publish fresh rankings under skewed load.
Open practiceLow-level designLast seen Nov 2021
Design a Priority and Arrival-Time Scheduler
Model a nonpreemptive single-core scheduler with deterministic eligibility, priority selection and explicit lifecycle commands.
Open practiceLow-level designLast seen Nov 2021
Design a Single-Branch Car Rental
Model reservation, pickup and return while protecting each car from conflicting bookings and simultaneous rentals.
Open practiceSystem designLast seen Jan 2019
Design a Recursive DNS Resolver
Resolve typed domain queries through the DNS hierarchy while controlling cache freshness, dependency failure and miss amplification.
Open practice03 · Evidence boundary
What “Apple interview questions” means here.
It means practicing transferable implementation, testing, and technical reasoning with public catalog assets FastPrep tags to Apple. It does not mean FastPrep has access to the company's assessments or any private interview bank.
Repeated public sightings and last-reported dates can help you prioritize practice, but they cannot predict the questions, format, or platform in a specific interview.
- Only Apple-tagged FastPrep catalog problems appear above.
- Stage labels and report dates remain visible as context.
- No official, private, leaked, or proprietary questions are claimed.
04 · Plain answers
Apple interview practice questions, answered plainly.
This page owns technical-practice intent for Apple. Hiring activity, timelines, and market signals remain on the separate hiring-insights page.
01Does this cover every type of Apple interview?
No. The page is limited to technical practice supported by 73 public coding problems and 20 system-design exercises. It is not a behavioral-question bank, hardware-interview guide, or complete process map. Use your team's role description and invitation to choose the relevant exercises.
02Is FastPrep affiliated with Apple?
No. FastPrep is an independent interview-preparation product and is not affiliated with Apple. The page uses FastPrep's public practice catalog and does not claim official, private, leaked, or proprietary employer questions.
03How are Apple problems assigned to interview stages?
Stage labels come from FastPrep's public problem metadata. A problem can carry more than one reported stage, and hiring processes can change by role, level, location, and date. Treat the labels as preparation context, not a guarantee.
04Which Apple interview stage should I practice first?
Start with the stage named in your invitation or recruiter message. If no stage is known, use the largest available set to build general problem-solving fluency, then rehearse explanation and testing separately.
05Does this page predict the Apple interview process?
No. Public catalog counts, stage tags, and last-reported dates can help prioritize practice, but they cannot predict a specific interview's questions, sequence, timing, or platform.
Your next stage, made concrete
Pick a problem. Solve it end to end.
Start with the stage named in your invitation, then use public evidence as context—not as a promise of what you will be asked.
Open the practice set