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Difficulty: Advanced

Advanced Concurrency

When would you choose a Swift actor over a serial DispatchQueue?

Compare language-level isolation with traditional queue-based synchronization in production iOS code

Swift Concurrency Architecture

Concurrency

Advanced Swift

Which design patterns have you used in iOS, and what tradeoffs did they have?

Group design patterns into creational, structural, and behavioral, then explain real iOS examples from SDKs and your own implementation experience with the tradeoffs that matter in production

Swift Architecture Patterns System Design

Swift

Advanced Swift

How does struct memory layout work in Swift?

Explain `MemoryLayout`, padding, alignment, and stride; show why stored-property order changes a struct's footprint; and connect it to arrays, performance, and low-level interop

Swift Value Types Memory Management

Swift

Advanced SwiftUI

What is a maintainable way to model navigation in a growing SwiftUI app?

Move beyond demo-level stacks and discuss route modeling, feature boundaries, and testability

SwiftUI Architecture Navigation

SwiftUI

Advanced UIKit

How do you debug a UICollectionView cell reuse bug that only appears during fast scrolling?

Turn a vague rendering issue into a disciplined diagnosis around state leakage, async work, and view configuration boundaries

UIKit Debugging Performance

UIKit