This book covers a wide array of essential topics, including sensors and actuators, various connectivity protocols, such as Wi-Fi and LPWAN, and data management like edge, fog, and cloud computing. It also covers major IoT applications, like smart cities, IIoT, and healthcare, including critical areas like security and safety. Each chapter presents a thoughtfully curated set of multiple-choice questions that help readers evaluate their understanding and grasp of key IoT concepts. These questions are intended to reinforce both theoretical foundations and application-level insights.