单选题Which RMAN backup command is used to create the block-change tracking file？（）Aalter database create block change tracking fileBalter database enable block change fileCalter database enable block change tracking using file ，/ora01/opt/ block_change_trac

第1题：

Which two statements regarding compressed backups in Recovery Manager （RMAN） are true？（）

• A、 Backup compression is disabled by default.
• B、 Backup compression can be used with both backup sets and image copies.
• C、 Backup compression cannot be enabled using the CONFIGURE command.
• D、 Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.
• E、 Backup compression applies to only backup sets.
• F、 Backup compression applies to only image copies.

第2题：

What is the purpose of the catalog command？（）  

• A、 To review RMAN control file and recovery catalog metadata and ensure that its correct
• B、 To delete RMAN backup-related metadata from the recovery catalog
• C、 To create metadata in the control file and the recovery catalog related to backup set pieces 
• D、 To create a report that lists database backups
• E、 To rebuild the recovery catalog

第3题：

The RMAN BACKUP command using the DELETE INPUT option can be used with which three types of files？ （）

• A、data files
• B、backup sets
• C、control files
• D、archived redo log files

第4题：

It is a holiday and no transactions are being performed on the database. You took a consistent backup of your database without using Recovery Manager （RMAN）. How would you make use of this consistent backup in RMAN？（）

• A、cannot be used in RMAN
• B、by starting up the database again
• C、by using the CATALOG command of RMAN
• D、by using the RECOVER CATALOG command in RMAN
• E、by re-creating the target control file to rebuild the RMAN repository

第5题：

You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy：   CONFIGURE RETENTION POLICY TO REDUNDANCY 3；   Which statement is true？（）  

• A、 The command fails because you cannot configure a redundancy-based retention policy when backup  optimization is enabled
• B、 Backup optimization is performed， but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
• C、 Backup optimization is permanently disabled
• D、 Backup optimization is temporarily disabled because a redundancy-based retention policy is specified

第6题：

You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for Recovery Manager (RMAN). To accomplish the backup, you issued the following RMAN command: RMAN> BACKUP SECTION SIZE 300M TABLESPACE users; Which two statements are true about the execution of the above command? （）(Choose two.)

• A、The backup piece size will be limited to 300 MB
• B、The RMAN uses multiplexing to perform backup
• C、The operation is accomplished using the default channel available
• D、The RMAN parallelizes the backup although the parallelism is not set for a channel

第7题：

Which RMAN backup command is used to create the block-change tracking file？（）  

• A、 alter database create block change tracking file
• B、 alter database enable block change file
• C、 alter database enable block change tracking using file ，/ora01/opt/ block_change_tracking.fil
• D、 alter system enable block change tracking using file ’/ora01/opt/block_ change_tracking.fil’
• E、 alter system block change tracking on

第8题：

Which command is used to configure RMAN to perform a compressed backup for every backup executed？（）

• A、 BACKUP AS COMPRESSED BACKUPSET DATABASE
• B、 BACKUP AS COMPRESSED COPY OF DATABASE
• C、 CONFIGURE DEVICE TYPE DISK BACKUP TYPE TO COMPRESSED BACKUPSET
• D、 CONFIGURE DEVICE TYPE DISK BACKUP TYPE COMPRESS 
• E、 BACKUP DATABASE COMPRESS

第9题：

You executed the following command in the Recovery Manager （RMAN）：   RMAN> REPORT NEED BACKUP days 3；   What is the output of this command？（）  

• A、 A list of files that require a backup within 3 days
• B、 A list of files requiring more than 3 days of archivelogs to apply
• 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 as already been performed in the last three days and which is  required to be backed up again based on the high number of transactions performed on them

第10题：

You configured the default backup device type as disk for RMAN backups. In your database，because of business requirements，you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used.  What must you set using the RMAN CONFIGURE command to achieve this？（）  

• A、 MAXSETSIZE TO 2
• B、 DEVICE TYPE DISK PARALLELISM 2
• C、 RETENTION POLICY TO REDUNDANCY 2
• D、 DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2