Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)
A.A PDB snapshot is always a full copy of the source PDB. B.A PDB snapshot is always a sparse copy of the source PDB. C.A snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems. D.A PDB snapshot depends on a storage snapshot which can be stored on any file system. E.A PDB snapshot depends on a storage snapshot which can only be stored on specific file systems. F.A snapshot copy PDB depends on a storage snapshot which can be stored on any file system. G.A snapshot copy PDB can be created from a stand-alone clone PDB.正确答案BG
