Always go for the latest version and moreover SCWCD 5.0 will better prepare for your technical challenges.
Which books are recommended for SCWCD 5.0 ?
The following are the recommended books for preparation of SCWCD 5.0. These are also the best books one would use for learning medium to advanced Java Servlets,JSP,JSF and more
Second Edition – Head First Servlets & JSP by Bryan Basham, Kathy Sierra, Bert Bates |This book is primarily recommended for the exam. You can also use any of the below books also for a complete preparation.
First Edition – Head First Servlets & JSP by Bryan Basham, Kathy Sierra, Bert Bates
Sun Certified Web Component Developer Study Companion by Charles Lyons
Sun Certified Web Component Developer Study Guide by David Bridgewater
SCWCD Exam Guide with Java EE 5 by Kunal Jaggi
The Links of Servlet specifications from Sun Microsystems and community process. SCWCD 5.0 uses Servlet 1.4 specifications only
Free SCWCD Mock exam question papers and dump links. Also find the links for SCWCD 5.0 simulators