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Your multitenant container database (CDB) is running in ARCHIVELOG mode. You connect to the CDB RMAN. Examine the following command and its output: You execute the following command: RMAN > BACKUP DATABASE PLUS ARCHIVELOG; Which data files will be backed up?（）
A:Data files that belong to only the root container
B:Data files that belong to the root container and all the pluggable databases (PDBs)
C:Data files that belong to only the root container and PDB$SEED
D:Data files that belong to the root container and all the PDBs excluding PDB$SEED

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出自：Oracle认证

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