iOS & Swift interview questions with answers

484 questions across 28 topics, from Swift basics to concurrency, memory, architecture and system design. Written for junior, middle and senior iOS developers.

• 📕 Programming basics 20 questions
• 📖 Object-oriented programming (OOP) 15 questions
• 📝 The Swift Language 18 questions
• 📱 UIKit 13 questions
• 🧱 IDEs & SDK 16 questions
• 💾 Memory management 25 questions
• 🚦 Multithreading & concurrency 17 questions
• 🗄 Databases & storage 16 questions
• 📶 Networking & APIs 17 questions
• 🏗 Design patterns 12 questions
• 🏛 Software architecture 22 questions
• 👨‍🔧 Software testing 13 questions
• 🧠 AI fundamentals for developers 42 questions
• 🤖 AI-assisted development 14 questions
• 📐 SwiftUI 20 questions
• ⚡️ Swift Concurrency (async/await, actors) 12 questions
• 🔗 Combine 13 questions
• 🦅 Modern Swift 12 questions
• 🧮 Algorithms & data structures 15 questions
• 🅾️ Objective-C 29 questions
• 📐 Auto Layout 13 questions
• 💬 Behavioral & Soft Skills 11 questions
• 🧩 What does it print? Interview puzzles 24 questions
• 🎯 Real interview tasks 34 questions
• 🚀 Performance 10 questions
• 🔐 Security 10 questions
• 📦 Building and shipping 10 questions
• ♿️ Accessibility and localization 11 questions