Which statement is true concerning dropping a pluggable database (PDB)?
A.
The PDB must be open in read-only mode.
B.
A dropped PDB can never be plugged back into a multitenant container database (CDB).
C.
The PDB data files are always removed from disk.
D.
The PDB must be in mount state.
E.
The PDB must be unplugged.
E, The PDB must be unplugged
A PDB can be dropped either from mount status (D) or unplugged(E)-not A
If unplugged it can be re-plugged to same cdb therefore B is wrong. To remove datafiles when dropped INCLUDE DATAFILES must be used (C wrong as NOT always).
Correct: D,E