This is a textbook for students of B.E., B.Tech., B.Arch., AMIE, GATE and UPSC (Engineering Services) Examinations. This latest edition revised, modified and updated all the chapters of the book, specifically last two Chapters. Chapter 22 Universities Questions with Answers-Solutions (Latest Selected) and Chapter 23 GATE and UPSC Examinations Questions with Answers-Solutions (Latest-Selected).