Examine these queries and their output: After a system crash, an instance restart and an attempted opening of the PDBs result in: Which two are true? (Choose two.)

Examine these queries and their output: After a system crash, an instance restart and an attempted opening of the PDBs result in: Which two are true? (Choose two.)

Examine this configuration: While CDB1 is open, 7u02/app/oracle/fast_recover_area/cdb1/CDB1/controlfile02.ctl’ is accidentally deleted. To recover from this critical failure, you execute these commands: What will be the outcome?

Which three can be done using Oracle Database Configuration Assistant (DBCA) starting from Oracle Database 19c? (Choose three.)
Examine these queries and their output: An online RMAN backup of the CDB was taken an hour before Restore Point R1 was created. You want to recover PDB1 to Restore Point R1. How do you achieve this?

A user complains about poor database performance. You want to verify if the user’s session has waited for certain types of I/O activity. Which view displays all waits waited on by a session at least once?
While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck. Which three are true about diagnosing and tuning these problems? (Choose three.)
Which three are true in Oracle 19c and later releases? (Choose three.)
Which two are true about RMAN backups when using a media manager to write backups to tape when there are only two tape drives? (Choose two.)
Examine this command: $ rhpctl move database -sourcehome Oracle_home_path -destinationhome Oracle_home_path For which two purposes can you use this command? (Choose two.)
Which four are true about a Recovery Manager (RMAN) duplication without a TARGET connection? (Choose four.)