Which are two of the steps taken by Database Configuration Assistant (DBCA) to clone a remote pluggable database (PDB) starting from Oracle 19c? (Choose two.)
A.
backing up the cloned PDB
B.
opening the cloned PDB
C.
creating a database link from CDB$ROOT in the local database to CDB$ROOT in the remote system that is to be cloned
D.
creating a database link from CDB$ROOT in the local database to the PDB in the remote system that is to be cloned
I think BC is correct.
This 15-minute tutorial shows you how to use Database Configuration Assistant (DBCA) to clone a remote pluggable database (PDB) into a container database (CDB).
https://docs.oracle.com/en/database/oracle/oracle-database/19/clone-pdbs-using-dbca-silent-mode/index.html
Prepare the PDB Before Cloning Step 5: Create a common user in ORCL, used in the database link automatically created in CDB19 to connect to ORCL during the cloning operation.
Note: to connect to ORCL during the cloning operation > automatically created in CDB19
BC
https://docs.oracle.com/en/database/oracle/oracle-database/19/multi/cloning-a-pdb.html#GUID-32AE49B1-13A7-4A4D-AB43-BA781ECA99D6
https://oracle-base.com/articles/19c/multitenant-dbca-pdb-remote-clone-19c
https://docs.oracle.com/en/database/oracle/oracle-database/19/admin/creating-and-configuring-an-oracle-database.html#GUID-6EDDC43D-9BD6-4096-8192-7E548B826360
The database link can connect as a common user to the root of the source CDB, or as a common or local user to the source PDB. The source PDB can be either a standard PDB or application PDB. => so D could be also TRUE, but who knows what DBCA does.
C for sure,
maybe not D: see example: https://docs.oracle.com/en/database/oracle/oracle-database/19/multi/relocating-a-pdb.html#GUID-146006B7-42F1-47EB-B1BA-C3F8E6DD89A8
BC
The DBCA operation executes the following steps:
1. Checks the presence of the database link. If the database link exists, DBCA drops it.
2. Creates the database link
3. Creates the PDB from the remote PDB
4. Checks the status of the cloned PDB to verify that it is in mounted mode
5. Opens the cloned PDB
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