This book is a study guide for any candidate preparing for the new SCWCD 5 version of the Sun Certified Web Component Developer exam (310-083 and upgrade 310-084). It contains the theory behind how the Web container works, and important notes, hints and tips on the types of trick questions to look for in the exam. By combining logical and easy-to-follow discussions with clear visual aids and diagrams, you will wonder by the end of the book why servlets, JSPs and tag libraries seemed so complicated before! By combining the theory taught in this book with practical experience, you will not only succeed in passing the exam, but will do so confident that you are able to solve problems and draw-up solutions 'on the job'.