Designing, developing, testing and managing software programs and systems encompass the field of software engineering. Due to its susceptibility to changes, the field is making advancements every now and then. The book, now in its Fifth Edition, has been restructured and revised completely to study the latest trends and developments in the field. It illustrates various emerging frameworks of software testing and designs in traditional, structured and unstructured environments. Several worked-out examples and practice problems have been included in each chapter.