单选题You defined the Recovery Manager （RMAN） retention policy to recovery window of 7 days by executing the following command：  RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS;  When a backup is performed， what would be the status of this back

第1题：

The backup retention policy is configured as RECOVERY WINDOW 2. You executed the following command in Recovery Manager （RMAN） against your database： RMAN> REPORT OBSOLETE； What would you see in the output？（）

• A、 a list of all those files that have been deleted in the last two days
• B、 a list of all those files that have been recovered within the last two days
• C、 a list of all the expired backups and copies
• D、 a list of backups and copies that are outside the range covered by the current retention policy

第2题：

You defined the Recovery Manager （RMAN） retention policy to recovery window of 7 days by executing the following command：  RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS；  When a backup is performed， what would be the status of this backup after seven days？（）

• A、 The backup would be marked as invalid.
• B、 The backup would be marked as obsolete.
• C、 The backup would be removed from the media.
• D、 The backup would be removed from the RMAN repository.

第3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4题：

You executed the following command in Recovery Manager （RMAN） against your Oracle 10g database：  RMAN> REPORT NEED BACKUP days 3;  What would be the output of this command？（） 

• 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

第5题：

You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option.  After some days， you want to change the status of the database backup and you issued the following command：   RMAN>CHANGE BACKUPSET 231 NOKEEP；   What is the implication of this command？（）

• A、 The backup is deleted.
• B、 The backup is marked unavailable.
• C、 The backup overrides the backup retention policy.
• D、 the backup becomes eligible for deletion according to the existing retention policy.

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第13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14题：

After running the CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS command， what has been accomplished？（）

• A、Retain the data file backup for 7 days.
• B、Run the recover process every 7 days.
• C、Destroy the physical backup files every 7 days.
• D、Destroy the physical backup files older than 7 days.
• E、Retain one backup of each data file for at least 7 days.
• F、Keep the catalog information in the control file for 7 days.

第15题：

You observe that the senior database administrator always uses the following command when connecting to Recovery Manager （RMAN）， and then starts executing commands to backup the database files：  $ rman target /  What would be the effect of this command？（）

• A、RMAN would use the current operating system location to place the backup.
• B、RMAN would use the control file of the target database to maintain the backup.
• C、RMAN would use the recovery catalog of the target database to maintain the backup.
• D、RMAN would use the control file of the target database to maintain the backup metadata. 
• E、RMAN would use the recovery catalog of the target database to maintain the backup metadata.

第16题：

You have issued the following command：    RMAN>CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 100 DAYS；   What will be the result of using the above command？（）

• A、 The backup metadata will be maintained in the control file for 100 days.
• B、 The backup metadata will be maintained in the recovery catalog for 100 days.
• C、 The backup metadata will be maintained in the flash recovery area for 100 days.
• D、 After 100 days， the backup sets and image copies will be deleted from the media.

第17题：

You set the recovery window to seven days and the backup optimization to ON using the CONFIGURE command of Recovery Manager （RMAN）. The most recent backup of the TOOLStablespace to disk was taken on January 3. The TOOLStablespace is read-only.On February 21， when you execute a command to back up all the tablespaces to disk， you find that RMAN backs up the TOOLS tablespace also， even though the contents of the tablespace have not changed after the backup on January 3. Because there are no changes made to the TOOLStablespace， you decide that the tablespace should not be backed up by RMAN. What can you do to skip backing up the TOOLStablespace without changing the current backup optimization setting？（）

• A、 configure a default device for RMAN backups
• B、 temporarily disable the retention policy for RMAN backups
• C、 configure automatic channel allocation for RMAN backups
• D、 use the CONFIGURE command to reconfigure the recovery window to 60 days

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