I found a quick and simple way to implement Instance Caging.
Simon Pane does a far better job of explaining The Power of the Oracle Database Proxy Authenticated Connections than I did in my little example in my Technical Note on Using #SQLTXPLAIN Through a Proxy User.
Finally got around to upgrading my Personal Edition of Oracle database (
PRODSRVR) from 220.127.116.11.0 to 18.104.22.168.0. I created a new Oracle Home and used DBUA to do the upgrade.
It is good to know that people are asking OCMs about how to approach the exam. Yury Velikanov provides his responses in How to prepare to Oracle Database 11g Certified Master Exam. I get similar questions myself.
I would only add that the exam is biased towards DBAs who work in an operational environment where you have to make decisions fast, and who are used to failing fast and picking themselves up quickly. The objective is to get a good enough solution quickly, not the perfect solution.
And remember, OEM is your salvation!