Which parameter can be changed by explicitly re-creating the control file or by using the DBNEWID utility?
You want to start a global service on your database. Which three conditions must be met?
For which use case would you use a rolling upgrade with the Oracle Active Data Guard feature?
Your database is open and the listener is running. The DBA stops the listener by using the command:
LSNRCTL> STOP
What happens to the sessions that are currently connected to the database instance?