Hi , I found out from the web that CX-310-080 has become obsolete and we have to take CX-310-081 only. Is it true? Should we refer different books to prepare for the 2 exams? If so can you suggest books for this version of the exam? I have read 1>Head First for scwcd and am going through 2>SCWCD by David Bridgewater (McGraw-Hill) Do you suggest any other book for the purpose?