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How do you configure a CDB for local undo mode?
A.Open the CDB instance in restricted mode. In CDB$ROOT drop the UNDO tablespace. Execute ALTER DATABASE LOCAL UNDO ON in each PDB and then restart the CDB正确答案B
Instance. B.Open the CDB instance in upgrade mode. In CDB$ROOT execute ALTER DATABASE LOCAL UNDO ON and then restart the CDB instance. C.Open the CDB instance in upgrade mode. In each PDB execute ALTER DATABASE LOCAL UNDO ON create an UNDO tablespace and then restart the CDB instance. D.Open the CDB instance in restricted mode. In CDB$ROOT execute ALTER DATABASE LOCAL UNDO ON. create an UNDO tablespace in each PDB and then restart the CDB instance. E.Open the CDB in read-only mode. In CDB$ROOT execute ALTER DATABASE LOCAL UNDO ON and then change the CDB to read/write mode.
