Which three are true about an application seed pluggable database (PDB)? (Choose three.)
A.
It is automatically synchronized with its application root PDB when an application is upgraded.
B.
It cannot be added to an application container after the application container has already been created.
C.
A new application PDB created by cloning an application seed PDB can have an old version of the application installed after cloning completes.
D.
It is automatically synchronized with its application root PDB when an application is installed.
E.
It cannot be dropped from its application container.
F.
A new application PDB created by cloning an application seed PDB can have an up-to-date version of the application installed after cloning completes.
G.
It is not required in an application container.
- An application seed is an optional, user-created PDB within an application container. You can use the DROP PLUGGABLE DATABASE statement to drop an application seed. You can drop an application seed when you no longer need it.
- After the application seed is created, it is synchronized with the application root so that the applications are installed in the application seed.
- When an application in the application root is upgraded or patched, the application seed must be synchronized with the application root to apply these changes.
To create an application container, the current container must be the CDB root and you must specify the AS APPLICATION CONTAINER clause in the CREATE PLUGGABLE DATABASE statement. You must create the application container using Oracle Managed Files. so F is wrong
Note: An application container cannot be unplugged or dropped if any application PDBs belong to it. so E is correct
@Dhanushbh : I believe that you may have read the question incorrectly. The question is asking about what is true about an "application SEED pluggable database".
Answer E is not saying that you drop the application container, merely that you drop the SEED pluggable database.
This is perfectly allowable, oracle-base displays this exact thing happening here: https://oracle-base.com/articles/12c/multitenant-application-containers-12cr2
We can drop an existing application seed like any other PDB. This has no impact on application container PDBs created using it.
CONN / AS SYSDBA
ALTER SESSION SET container = appcon1;
ALTER PLUGGABLE DATABASE appcon1$SEED CLOSE;
DROP PLUGGABLE DATABASE appcon1$SEED INCLUDING DATAFILES;
E is, definitely, incorrect.
Dropping an Application Seed: https://docs.oracle.com/en/database/oracle/oracle-database/19/multi/creating-removing-application-containers-seeds-with-sql-plus.html#GUID-93AAE6F0-7969-4D05-B10B-F2514CB39417
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