Hi Charlsy,
I hope I understood your question correctly...
The K&B 6 book is pretty good in terms of studying for the OCA 7 exam. There are also other books available that are focused on the new OCA 7 exam.
BUT, K&B 6 IS NOT enough for the upgrade exam! The upgrade exam includes HUGE new topics that any older book will probably not cover:
- NIO2
- java.util.concurrent
-
JDBC
When it's time to study for the upgrade exam, check the table of contents of any material you're thinking of, to make sure those topics are covered!!
hth,
Bert