You are migrating a non TDE encrypted on-premises Database to an OCI Database Service Instance using RMAN.
You set up the DB Cloud Backup Module, but when executing the RMAN command to create your Cloud Backup you see the following error:
RMAN-03009: failure of backup command on ORA_SBT_TAPE_1 channel at 08/15/2014 11:10:57
ORA-19914: unable to encrypt backup
ORA-28361: master key not yet set
What are the two causes of this error? (Choose two.)
The error indicates that the master encryption key has not been set, which implies that encryption settings are being used. Therefore, executing the SET ENCRYPTION ON command would initiate encryption requirements. Similarly, executing the SET ENCRYPTION IDENTIFIED BY <password> command would also trigger encryption mechanisms that require a master key. The combination of these settings without a master key results in the provided error, making these the correct two causes of the error.
A and E
It's not a dual-mode encryption (NON TDE encryption). Thus E is not true. The correct answer is indeed A & B. See Link https://docs.oracle.com/en/cloud/paas/db-backup-cloud/csdbb/backing-oracle-database-backup-cloud-service-using-dual-mode-encryption.html