The answer to that question is right here!
Written by Roger Sanders
Shortly before my book DB2 9 for Linux, UNIX, and Windows Database Administration: Certification Study Guide went into a second printing (which was in May 2009), IBM invited me to help develop the DB2 9.7 for Linux UNIX, and Windows Database Administration (DBA) certification exam (Exam 541). Knowing that a new version of the DBA exam was about to be created, I contacted my editor and asked if we should update my DB2 9 DBA book to cover the upcoming exam. At that time, it was decided that such a revision would be too costly and time-consuming and that, instead, the next revision would take place after the DB2 10 exams were developed.