Textbook in PDF format "Architecting Modern Systems: A Practical Approach to System Design Interviews" is a comprehensive guide for software engineers preparing for technical interviews. This book provides a structured framework to tackle complex system design challenges, covering everything from fundamental concepts to cutting-edge technologies. The book breaks down each topic into digestible chapters with detailed subsections, offering both theoretical knowledge and practical implementation strategies. Readers will learn how to design scalable, resilient, and high-performance systems while mastering essential components like distributed databases, caching mechanisms, and microservices architecture. What sets this book apart is its balanced coverage of both traditional system design principles and emerging technologies like cloud-native architectures, Machine Learning systems, and blockchain-based designs. Each chapter includes real-world case studies that demonstrate how theoretical concepts apply to actual industry problems. The book is structured to build knowledge progressively, starting with core fundamentals before advancing to specialized topics. With extensive coverage of performance optimization, security considerations, and ethic