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

The book "Swift (iOS/macOS) Interview: 200 Questions and Answers" is a practical guide for those preparing for a technical interview for an iOS or macOS developer position. The author has collected 200 real questions that are most often asked in interviews at IT companies and provided detailed, structured answers to them.

The book covers all key topics:

• Swift language basics: data types, optionals, functions, closures, protocols, extensions, generics, memory management (ARC, weak/unowned).
• iOS/macOS development: UIKit, SwiftUI, Autolayout, application and ViewController lifecycle, networking (URLSession, Codable), Core Data, UserDefaults, multithreading (GCD, OperationQueue).
• Architecture and patterns: MVC, MVVM, VIPER, Coordinator, DI, SOLID, Singleton, Delegate, NotificationCenter.
• Testing: Unit tests, UI tests, XCTest, mocks and stubs.
• Tools: Xcode, Git, CocoaPods/SPM, debugging, profiling (Instruments).
• Algorithms and data structures: basic tasks (arrays, dictionaries, strings, trees) in the context of iOS.

Each question is accompanied not only by the correct answer but also by explanations, Swift code examples, and tips on how to best present your knowledge during the interview. Special attention is paid to typical pitfalls and traps that often trip up candidates.

Who is this book for?

• Junior developers: systematize your knowledge, fill in gaps, learn what is asked in interviews.
• Middle developers: refresh your memory on complex topics (ARC, multithreading, architecture), prepare for tricky questions.
• Students and course graduates: get structured material for quick preparation.
• Team leads and HR: use the book as a base for creating your own questions.

The book is written in simple, understandable language, without unnecessary fluff. Each answer can be read in 1-2 minutes, making it convenient for review before an interview. The question-and-answer format allows you to quickly find the desired topic without wasting time flipping through theory.

After reading, you will be able to confidently answer questions on Swift, iOS/macOS SDK, architecture, and tools, as well as solve practical problems in interviews. The book will become your reliable assistant in preparing for your dream offer.

Additional materials: at the end of the book, you will find a list of recommended literature, links to Apple documentation, and useful resources for in-depth study.

Don't leave your preparation to the last day — start right now with this collection of questions and answers!