iOS

Swift: optionals, closures, protocols, extensions, generics, property wrappers

Swift 동시성: async/await, actors, structured concurrency, Task

UIKit: UIViewController 수명 주기, Auto Layout, UITableView, UICollectionView

SwiftUI: Composables, State (@State, @Binding, @StateObject), Recomposition

네비게이션: NavigationStack, NavigationLink, sheets, alerts, programmatic

아키텍처: MVVM, protocol-oriented programming, dependency injection

Combine: Publishers, Subscribers, Operators, data flow, @Published

Core Data: entities, relationships, NSFetchedResultsController, 마이그레이션

네트워킹: URLSession, Codable, async/await, 에러 처리, caching

영속성: UserDefaults, Keychain, FileManager, 앱 전용 저장소

메모리 관리: ARC, weak/strong 참조, retain cycles

테스트: XCTest, UI Testing, mocking, test doubles, TDD 관행

성능: Instruments, 메모리 누수, 뷰 계층 구조, lazy loading

앱 수명 주기, scenes, 푸시 알림, 백그라운드 작업

Swift Package Manager, Xcode, CI/CD, App Store 배포