Swift (iOS/macOS) Interview: 200 Questions and Answers

The book "Swift Interview (iOS/macOS): 200 Questions and Answers" is a practical guide for developers preparing for technical interviews for iOS/macOS developer positions. The author has collected and structured the most frequently asked questions, breaking them down by key topics so you can systematically review the material and feel confident during the interview.

What is this book about?

The publication covers the full range of topics necessary for successfully passing an interview:

• Swift Basics: data types, optionals, closures, protocols, generics, memory management (ARC), error handling.
• iOS/macOS Development: UIKit, SwiftUI, ViewController lifecycle, Auto Layout, working with tables and collections, navigation.
• Multithreading: Grand Central Dispatch (GCD), OperationQueue, async/await, data synchronization.
• Data Storage: Core Data, Realm, UserDefaults, Codable, networking (URLSession).
• Architecture and Patterns: MVC, MVVM, Coordinator, SOLID, DI (Dependency Injection).
• Testing and Tools: Unit tests, UI tests, Xcode, debugging, Instruments.
• General Questions: Git, CI/CD, App Store publishing, Code Review.

Who is this book for?

• Junior developers: who are just starting their career in iOS/macOS and want to understand what questions are asked in interviews.
• Middle developers: who wish to systematize their knowledge and fill in the gaps.
• Senior developers: for a quick review of key concepts before an interview.
• Team Leads and mentors: as a ready-made checklist for evaluating candidates.

What will the reader learn?

After studying the book, you will be able to:

• Confidently answer questions about the Swift language, its features, and syntax.
• Explain the principles of UIKit and SwiftUI, and component lifecycles.
• Understand memory management, avoid leaks and retain cycles.
• Comprehend multithreading and properly use GCD and async/await.
• Navigate architectural patterns and choose the right one for a project.
• Prepare correct answers for behavioral questions and questions about experience.

Each question is accompanied by a detailed answer with code examples, comments, and explanations. The book is structured so you can study topics in any order — from simple to complex or by focusing on weak areas. This is not just a list of questions, but a full-fledged training tool for preparing for an interview of any level.

Take your next step in your career as an iOS/macOS developer — start preparing with this book!