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Identify two correct statements about multitenant architectures.

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

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

C.
Multiple CDBs share certain PDB resources.

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

E.
Patches are always applied at the CDB level.

F.
A PDB can have a private undo tablespace.

Explanation:
B: Using 12c Resource manager you will be able control CPU, Exadata I/O, sessions and parallel servers. A
new 12c CDB Resource Manager Plan will use so-called “Shares” (resource allocations) to specify how CPU is
distributed between PDBs. A CDB Resource Manager Plan also can use “utilization limits” to limit the CPU
usage for a PDB. With a default directive, you do not need to modify the resource plan for each PDB plug and
unplug.
E: New paradigms for rapid patching and upgrades.
The investment of time and effort to patch one multitenant container database results in patching all of its many
pluggable databases. To patch a single pluggable database, you simply unplug/plug to a multitenant container
database at a different Oracle Database software version.
Incorrect:
Not A:
* The Oracle RAC documentation describes special considerations for a CDB in an Oracle RAC environment.
* Oracle Multitenant is a new option for Oracle Database 12c Enterprise Edition that helps customers reduce IT
costs by simplifying consolidation, provisioning, upgrades, and more.
It is supported by a new architecture that allows a container database to hold many pluggable databases. And it
fully complements other options, including Oracle Real Application Clusters and Oracle Active Data Guard. An
existing database can be simply adopted, with no change, as a pluggable database; and no changes are
needed in the other tiers of the application.
Not D: You can unplug a PDB from one CDB and plug it into a different CDB without altering your schemas or
applications. A PDB can be plugged into only one CDB at a time.
not F:
* UNDO tablespace can NOT be local and stays on the CDB level.
* Redo and undo go hand in hand, and so the CDB as a whole has a single undo tablespace per RAC instance.

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