Examine this configuration:
1. CDB1 is an Oracle container database from an older release.
2. PDB1, PDB2, PDB3, and PDB4 are pluggable databases in CDB1.
A priority list UpgrdList has these entries:
1, pdb2
2, pdb1, pdb3
You execute this command:
$ /u01/app/oracle/product/18.1.0/db_1/rdbms/admin/dbupgrade -L UpgrdList
In which order will the upgrade occur?
The upgrade order follows a specific sequence where CDB$ROOT is always upgraded first as it is the main container database. Next is PDB$SEED, which serves as a template for new pluggable databases. After upgrading CDB$ROOT and PDB$SEED, the PDBs listed in the priority list come next, following the specified priority. Finally, any PDBs not included in the priority list, such as PDB4 in this case, are upgraded last. Therefore, the correct order is CDB$ROOT, PDB$SEED, PDB2, PDB1, PDB3, and PDB4.
c as x docs Upgrades PDBs using a priority list during an Oracle Database upgrade, and specifies the priority list name. The priority list updates priority status in the database during upgrade. This priority listing is maintained in future upgrades. By default the CDB$ROOT and PDB$SEED databases are always processed first. They are processed first even if they are not added to a priority list. All PDBs in the priority list are processed before PDBs not in the priority list
https://docs.oracle.com/en/database/oracle/oracle-database/19/upgrd/manual-upgrade-scenarios-multitenant-architecture-oracle-databases.html#GUID-6471F9F4-5151-4FA3-B5EC-B5AEBD99B0AA 1) CDB$ROOT: Priority 1. Upgrading the container database first is a mandatory priority. You cannot change the priority for the container database upgrade. CDB$ROOT is always processed first. 2) PDB$SEED: Priority 1. Upgrading the PDB seed database is a mandatory priority. You cannot change the priority for the PDB seed upgrade. PDB$SEED always upgraded after CDB$ROOT, and with the first batch of PDB upgrades. since -C argument is not used PDB4 is not excluded and will be upgraded in the end Agree with "C"
100% sure C
yes Ok
C correct - see ilputto