System Design for Apple Platforms Questions
Architectural patterns and system design considerations for building software on Apple platforms (iOS, macOS, watchOS, tvOS). Includes architecture styles (MVC, MVVM, VIPER, Clean Architecture), data flow and separation of concerns, offline caching and synchronization, caching strategies, performance optimization, platform constraints, and patterns for scalable, maintainable Apple ecosystem applications.
HardSystem Design
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Design a testing and validation strategy to ensure end-to-end synchronization correctness across flaky networks and multiple Apple devices. Include deterministic unit/integration tests, network fault injection in CI, simulator-based multi-device tests, and methods to validate real-world behavior in production.
EasyTechnical
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Describe strategies for handling model schema changes on Apple clients when an app update introduces a new data model version. Discuss lightweight migrations, versioned stores, and approaches for rolling out migrations without causing bad UX or crashes.
MediumTechnical
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Compare REST and GraphQL for mobile Apple clients where many small screens request different subsets of data and offline behavior is required. Discuss caching, batching, schema evolution, overfetching/underfetching, and implications for synchronization and background updates.
HardTechnical
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A production issue shows memory pressure crashes on watchOS when syncing a large dataset from the iPhone. How would you diagnose the problem in production, reproduce locally, and propose architectural changes to avoid crashes while preserving sync correctness?
MediumTechnical
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Scenario: A user edits the same document on their iPhone and iPad while offline. Describe a practical conflict resolution strategy that balances automatic merging and user-driven resolution. Include how clients detect conflicts, metadata to store, and UX patterns for presenting conflicts on Apple platforms.
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