Which two are true concerning a multitenant container database with three pluggable database?

Many administrative tasks, such as patching, parameter changes, and backup configuration, are performed at the CDB level and automatically affect all PDBs, so not all tasks must target a specific PDB.

Pluggable databases reduce patching time because a single patch operation on the CDB covers all contained PDBs rather than requiring individual patch cycles.

Because all PDBs in a CDB share one set of background processes, memory structures, and Oracle binaries, routine tasks such as upgrades and patches apply to the CDB once rather than to each database individually, reducing overall administration effort.

Patching the CDB's Oracle home applies the patch to all PDBs simultaneously, so administrators do not need to schedule and execute separate patch runs per database.

PDBs support many use cases beyond consolidation, including development and test isolation, application containers, and rapid provisioning via cloning.