A. The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.
B. The DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.
C. The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.
D. The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.
E. The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent.

A. mount the new disk group in the ASM instance
B. restart the ASM instance and the production database instance
C. register the new disk groups in the production database instance
D. restart the ASM instance without restarting the production database instance
E. include the new disk group in the ASM_DISKSTRING parameter in the parameter file and restart the ASM instance

A. You must recover all data files to the required system change number （SCN）.
B. You must recover all data files， except those that are offline， to the required SCN.
C. You must recover all data files belonging to the USERS tablespace to the required SCN.
D. You cannot recover all data files because segment space management is performed manually for the undo tablespace.

A. A primary key must have been created.
B. A mapping table must have been created.
C. An overflow tablespace must have been specified.
D. The PCTTHRESHOLD option must have been specified.

A. shut down and restart the instance
B. add new tempfiles to the temporary tablespaces after recovery
C. perform a media recovery and open the database with the RESETLOGS option
D. perform a media recovery and bring the database to NOARCHIVELOG mode

A. RMAN recovers up to log sequence 230， but not including 230.
B. RMAN returns an error because the log sequence number mentioned in the command should be 229.
C. RMAN returns an error because the log sequence number mentioned in the command may never be missing.
D. RMAN recovers up to and including log sequence 229 but then returns an error because log sequence 230 is missing.

A. a list of files that require a backup within three days
B. a list of files that have not been backed up for three days
C. a list of files that RMAN recommends be backed up only once in every three days， based on low volatility
D. a list of files for which a backup has already been performed and may need a backup after three days

A. The EVENT parameter was not set
B. The SQL_TRACE parameter is set to FALSE
C. The Enterprise Manager Grid Control is not used
D. The STATISTICS_LEVEL parameter is set to BASIC
E. The TIMED_STATISTICS parameter is set to FALSE

A. CPU usage
B. degree of parallelism
C. number of open cursors
D. number of sorts performed
E. idle time for blocking sessions
F. number of disk I/O operations performed
G. number of memory I/O operations performed

A. It keeps track of changes in the background processes.
B. It records the system change number （SCN） in the control file.
C. It writes audit records for user changes to the change tracking file.
D. It records any changes to the listened configuration in the listener.ora file.
E. It records any changes to the database parameters in the change tracking file.
F. It records the physical location of all the changes that are made to the database in the change tracking file.