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Your multitenant container database, CDB1, is running in ARCHIVELOG mode and has  two pluggable databases, HR_PDB and ACCOUNTS_PDB. An RMAN backup exists for the database.You issue the command to open ACCOUNTS_PDB and find that the USERDAT

2024-07-09

A.DBFdata file for the default permanent tablespace USERDATA belonging to ACCOUNTS_PDB is corrupted.What should you do before executing the commands to restore and recover the data file in ACCOUNTS_PDB、A.Place CDB1 in the mount stage and then the USERDATA tablespace offline in ACCOUNTS_PD

B.B.Place CDB1 in the mount stage and issue the ALTER PLUGGABLE DATABASE accounts_pdb CLOSE IMMEDIATE command.

C.Issue the ALTER PLUGGABLE DATABASE accounts_pdb RESTRICTED comman

D.D.Take the USERDATA tablespace offline in ACCOUNTS_PDB

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