A.They can be created only in an application root.

B.They can exist in user-defined schemas only in application containers.

C.They can be extended data-linked in CDB$ROOT.

D.They can exist in CDB$ROOT and an application root.

E.They can be created only in CDB$ROOT.

F.They can be only metadata-linked in an application container.

A.A sequence can issue the same number more than once.

B.Sequences that start with 1 and increment by 1 can never have gaps.

C.A sequence can provide numeric values for more than one column or table.

D.Sequence numbers that are allocated require a COMMIT statement to make the allocation permanent.

E.The data dictionary is always updated each time a sequence number is allocated.

A.It always analyzes all schemas in the database.

B.It can recommend changes to improve the statistics gathering process.

C.It can be run only automatically.

D.It can be run only manually.

E.It runs automatically every night by default.

A.If an RMAN command fails, the output will identify the channel ID where the failure occurred. D)Media Management errors appear as a line with "Additional information" and a number.

B.Some messages in the error stack are not errors.

C.If an RMAN command fails, the output will only identify the command that failed.

D.Media Management errors appear as a line with "sbtio" and a number.

E.Media Management errors appear as a line with "sbtio".

A.A DBA can run it manually.

B.Results are written to the alert log.

C.It analyzes a period of time corresponding to the last day of activity.

D.It runs automatically after each AWR snapshot.

E.It analyzes a period of time corresponding to the 12 hours of activity.