iOS Developer Interview Handbook

𝗶𝗢𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗛𝗮𝗻𝗱𝗯𝗼𝗼𝗸 is your ultimate companion to prepare, practice, and succeed in iOS developer interviews.

Whether you are a fresher aiming for your first iOS role or an experienced engineer looking to switch to 𝘁𝗼𝗽 𝘁𝗲𝗰𝗵 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀, this handbook covers everything you need from core concepts to advanced topics, explained in a simple and structured way.

📖 𝗧𝗼𝘁𝗮𝗹 𝗣𝗮𝗴𝗲𝘀: 𝟱𝟲𝟰

♾️ 𝗟𝗶𝗳𝗲𝘁𝗶𝗺𝗲 𝗙𝗿𝗲𝗲 𝗨𝗽𝗱𝗮𝘁𝗲𝘀 — Get access to the latest updates whenever new interview trends, tools, or iOS features are added.

𝗜𝗻𝘀𝗶𝗱𝗲, 𝘆𝗼𝘂’𝗹𝗹 𝗳𝗶𝗻𝗱:

𝗶𝗢𝗦 𝗕𝗮𝘀𝗶𝗰𝘀 – Build a strong foundation to tackle entry-level and tricky fundamental questions.

𝗦𝘄𝗶𝗳𝘁 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲 – Master essential syntax, advanced features, and real-world coding scenarios.

𝗢𝗯𝗷𝗲𝗰𝘁-𝗢𝗿𝗶𝗲𝗻𝘁𝗲𝗱 & 𝗣𝗿𝗼𝘁𝗼𝗰𝗼𝗹-𝗢𝗿𝗶𝗲𝗻𝘁𝗲𝗱 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 – Learn how Apple blends both paradigms and how interviewers test them.

𝗶𝗢𝗦 𝗨𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 (𝗨𝗜𝗞𝗶𝘁) & 𝗦𝘄𝗶𝗳𝘁𝗨𝗜 – Covering both traditional and modern UI frameworks with practical Q&A.

𝗗𝗮𝘁𝗮 𝗣𝗲𝗿𝘀𝗶𝘀𝘁𝗲𝗻𝗰𝗲 & 𝗦𝘁𝗼𝗿𝗮𝗴𝗲 – Core Data, SQLite, UserDefaults, and more explained with clarity.

𝗡𝗲𝘁𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝗶𝗻 𝗶𝗢𝗦 – URLSession, REST APIs, JSON parsing, and error handling.

𝗠𝘂𝗹𝘁𝗶𝘁𝗵𝗿𝗲𝗮𝗱𝗶𝗻𝗴 & 𝗖𝗼𝗻𝗰𝘂𝗿𝗿𝗲𝗻𝗰𝘆 – Grand Central Dispatch (GCD), Operation Queues, and Swift Concurrency (async/await).

𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 & 𝗗𝗲𝘀𝗶𝗴𝗻 𝗣𝗮𝘁𝘁𝗲𝗿𝗻𝘀 – MVC, MVVM, VIPER, and the Composable Architecture (TCA).

𝗗𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 – CocoaPods, Swift Package Manager, and Carthage.

𝗠𝗲𝗺𝗼𝗿𝘆 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 & 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲 – ARC, retain cycles, and optimization strategies.

𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗶𝗻 𝗶𝗢𝗦 – Unit, integration, and UI testing with XCTest.

𝗔𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝗶𝗢𝗦 𝗧𝗼𝗽𝗶𝗰𝘀 – Push notifications, background tasks, app lifecycle, and more.

𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆 𝗶𝗻 𝗶𝗢𝗦 𝗔𝗽𝗽𝘀 – Keychain, secure coding, and best practices.

𝗔𝗽𝗽𝗹𝗲 𝗘𝗰𝗼𝘀𝘆𝘀𝘁𝗲𝗺 𝗞𝗻𝗼𝘄𝗹𝗲𝗱𝗴𝗲 – WatchOS, tvOS, macOS integration, and App Store submission process.

𝗗𝗲𝘃𝗢𝗽𝘀 𝗳𝗼𝗿 𝗶𝗢𝗦 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿𝘀 – CI/CD pipelines, Fastlane, and automation.

𝗦𝗰𝗲𝗻𝗮𝗿𝗶𝗼-𝗕𝗮𝘀𝗲𝗱 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 – Real-world challenges that prepare you to think like a problem solver.

𝗪𝗵𝘆 𝗧𝗵𝗶𝘀 𝗕𝗼𝗼𝗸?

Unlike generic guides, this handbook doesn’t just give you answers — it explains concepts in simple language, highlights interviewer expectations, and builds your confidence step by step.

By the end, you’ll not only feel prepared for interviews but also become a stronger, well-rounded iOS developer.