In your multitenant container database (CDB) with two pluggable database (PDBs). You
want to create a new PDB by using SQL Developer. Which statement is true?
A.
The CDB must be open.
B.
The CDB must be in the mount stage.
C.
The CDB must be in the nomount stage.
D.
Alt existing PDBs must be closed.
Explanation:
A
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Fairly obvious that the DB must be open, but to confirm with Oracle documentation:
https://docs.oracle.com/database/121/ADMIN/cdb_plug.htm#ADMIN13565
“Ensure that the following prerequisites are met before creating a PDB:
The CDB must exist.
The CDB must be in read/write mode.”