1.Which two are prerequisites for creating a backup-based duplicate database?
Choose two. Some archived log backups have been accidentally deleted from storage. Which two commands should be used to update the status of backups in the recovery catalog to display only the missing backups?
Which should be tuned first when doing a performance tuning exercise for an Oracle Database environment?
Examine this configuration:
You execute these commands before upgrading the database to the current release:
For which databases will fixup scripts be created?
Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)