Skip to content - Concurrency 14 questions Actors, isolation, Sendable, structured concurrency, and the Swift 6 rules that trip people up.
- Architecture 14 questions Patterns, modularization, dependency inversion, and the problems that only surface on large teams.
- Language & Runtime 15 questions Generics, existentials, ARC, dispatch, ABI stability, and what Swift actually does under the hood.
- Performance & Debugging 7 questions Instruments, memory leaks, retain cycles, launch time, and finding regressions before users do.
- SwiftUI 6 questions Navigation state, re-render debugging, UIKit interop, and building components that scale.