This repository is a comprehensive collection of iOS interview questions and answers, accompanied by numerous small demo projects that illustrate key concepts in iOS development. The core content consists of detailed markdown documents covering Objective-C and Swift interview topics, including language fundamentals, runtime internals, memory management, design patterns (MVVM, Redux, Clean Architecture), and behavioral interview guides. The demo projects are self-contained Xcode applications that demonstrate specific patterns or answer common interview questions, such as memory leak examples, KVO implementation, block variable capture, and MVVM/Redux state management. The repository also includes standalone coding challenges (e.g., CachableAsyncImage, NetworkingProvider) and Xcode file templates for generating Clean Swift architecture components. While the codebase is fragmented across many independent projects and some older Objective-C demos may rely on deprecated APIs, the overall collection serves as a valuable educational resource for iOS developers preparing for technical interviews. The repo is not a production application but a reference library of patterns and examples.