Identify two correct statements about multitenant architectures.

A.
Multitenant architecture can be deployed only in a Real Application Clusters (RAC)
configuration.

B.
A PDB can have a private undo tablespace.

C.
Patches are always applied at the CDB level.

D.
Multiple non-RAC CDB instances can mount the same PDB as long as they are on the
same server.

E.
Multiple pluggable databases (PDBs) share certain multitenant container database (CDB)
resources.

F.
Multiple CDBs share certain PDB resources.