In the ever-evolving landscape of computer science, the study of data structures and algorithms remains a cornerstone of both academic inquiry and practical application. This book, "Data Structure and Algorithm Previous Year Question Book", is a meticulously curated resource, designed to bridge the gap between theoretical knowledge and its implementation in real-world scenarios. As the complexity and scale of data-driven systems continue to grow, a profound understanding of these fundamental concepts is essential for any aspiring software engineer, researcher, or computer science professional. The content of this book is structured to provide comprehensive coverage of the most critical topics in data structures and algorithms. Each chapter is crafted with precision, offering an in-depth exploration of concepts such as arrays, linked lists, stacks, queues, trees, graphs, and a wide variety of sorting and searching algorithms. The theoretical underpinnings are presented in a clear and concise manner, ensuring that the foundational principles are well understood before progressing to more complex topics. A unique feature of this book is the integration of previous year exam questions, which have been selected to represent a diverse range of problem types and difficulty levels. Each question is accompanied by a detailed solution, meticulously crafted to guide the reader through the problem-solving process. These solutions not only provide the correct answers but also elucidate the underlying logic and algorithms, fostering a deeper comprehension of the material. In recognition of the diverse learning preferences of readers, this book is complemented by a series of video tutorials. These tutorials serve as an extension of the written content, providing a visual and interactive medium for learning. By engaging with these resources, readers will be better equipped to tackle the challenges presented in both academic and professional settings. We hope that this book serves as a valuable tool in your journey to mastering data structures and algorithms, and that it helps you build a robust foundation for future success in the field of computer science.