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Question 16

Which two are prerequisites for performing a flashback transaction? (Choose two.)

A.Flashback Database must be enabled.
B.Undo retention guarantee for the database must be configured.
C.EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
D.Supplemental logging must be enabled.
E.Recycle bin must be enabled for the database.
F.Block change tracking must be enabled tor the database.

Question 17

You are administering a database stored in Automatic Storage Management (ASM). You use RMAN to back up the database and the MD_BACKUP command to back up the ASM metadata regularly. You lost an ASM disk group DG1 due to hardware failure.
In which three ways can you re-create the lost disk group and restore the data?

A.Use the MD_RESTORE command to restore metadata for an existing disk group by passing the existing disk group name as an input parameter and use RMAN to restore the data.
B.Use the MKDGcommand to restore the disk group with the same configuration as the backed-up disk group and data on the disk group.
C.Use the MD_RESTORE command to restore the disk group with the changed disk group specification, failure group specification, name, andother attributes and use RMAN to restore the data.
D.Use the MKDG command to restore the disk group with the same configuration as the backed-up disk group name and same set of disks and failure group configuration, and use
RMAN to restore the data.
E.Use the MD_RESTORE command to restore both the metadata and data for the failed disk group.
F.Use the MKDG command to add a new disk group DG1 with the same or different specifications for failure group and other attributes and use RMAN to restore the data.

Question 18

Which three statements are true concerning the multitenant architecture? (Choose three.)

A.Each pluggable database (PDB) has its own set of background processes.
B.A PDB can have a private temp tablespace.
C.PDBs can share the sysaux tablespace.
D.Log switches occur only at the multitenant container database (CDB) level.
E.Different PDBs can have different default block sizes.
F.PDBs share a common system tablespace.
G.Instance recovery is always performed at the CDB level.

Question 19

Which two are prerequisites for performing a flashback transaction?

A.Flashback Database must be enabled.
B.Undo retention guarantee for the database must be configured.
C.EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
D.Supplemental logging must be enabled.
E.Recycle bin must be enabled for the database.
F.Block change tracking must be enabled tor the database.

Question 20

Which two actions does an incremental checkpoint perform? (Choose two.)

A.It signals CKPT to write the checkpoint position to the data file headers.
B.It writes the checkpoint position to the data file headers.
C.It advances the checkpoint position in the checkpoint queue.
D.It writes the checkpoint position to the control file.