The book is primarily intended to be used by undergraduate students who are familiar with the concepts of programming and ‘C’ programming language. The topics chosen are centered around a standard data structures syllabus for any undergraduate curriculum. The book also covers the syllabi of the paper “data structure” for “a” and “B” level courses of DOEACC. Our presentation style is based on our belief in progressing from the concrete to the abstract. A large number of objective type questions (with answers) have been provided in this book.