Which two are true about creating pluggable databases (PDBs) in Oracle 19c and later releases? (Choose two.)
Which two are true about creating pluggable databases (PDBs) in Oracle 19c and later releases? (Choose two.)
A PDB snapshot depends on an existing storage snapshot of the source PDB, while a PDB snapshot can also be a full copy of a source PDB. In Oracle 19c and later, a PDB snapshot must have an existing storage snapshot to function as it provides the baseline data for the snapshot to be created. Additionally, a PDB snapshot may serve as a complete, stand-alone copy of the source PDB.
IT'S CORRECT
A "PDB snapshot" is a point-in-time copy of a PDB. The source PDB can be open read-only or read/write while the snapshot is created. A clone from a PDB snapshot is a full, standalone PDB. A "snapshot copy PDB" is based on a copy of the underlying storage system. Snapshot copy PDBs reduce the amount of storage required for testing purposes and reduce creation time significantly.
Only E is correct. Snapshot copy is different than PDB snapshot
An excerpt from the official student guide "D108654GC10 - Oracle Database 19c: Multitenant Architecture", p220: "Database-level copy of a PDB. No storage-level snapshot is involved. Either a full copy of the source PDB or a sparse copy of the PDB."