单选题You issue the following RMAN command to set a retention policy on a database: RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2; What will be the outcome of issuing this command?（）A After two days, a backup will be marked obsoleteB After two days, a 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：

Examine the following RMAN command：   BACKUP DATABASE TAG TESTDB  KEEP UNTIL ’SYSDATE+1’ RESTORE POINT TESTDB06；   Which two statements are true regarding the backup taken by using the above RMAN command？（）  

• A、 Only data files and the control file are backed up.
• B、 Archived redo logs are backed up only if the database is open during the backup.
• C、 The backup is deleted after one day，regardless of the default retention policy settings. 
• D、 The backup becomes obsolete after one day，regardless of the default retention policy settings.

第4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5题：

You issue the following command on the RMAN prompt.   RMAN> REPORT NEED BACKUP DAYS = 5 DATABASE；   Which statement is true about executing this command？（）

• A、 It will display a list of files that need incremental backup.
• B、 It will display a list of files that need backup after five days.
• C、 It will display a list of files that were backed up in the last five days.
• D、 It will display a list of files that have not been backed up in the last five days.
• E、 It will apply the current retention policy to determine the files that need to be backed up.

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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：

You issue the following RMAN command to set a retention policy on a database：       RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2；   What will be the outcome of the above command？（）

• A、 After two days， the backup will be marked obsolete.
• B、 After two days， the backup will be deleted from the media.
• C、 If the RMAN repository has records of two or more recent backups of a file， then the older backup will be deleted from the media.
• D、 If the RMAN repository has records of two or more recent backups of a file， then the older backup will be marked obsolete.

第15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

第16题：

You issue the following RMAN command to set a retention policy on a database：   RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2；   What will be the outcome of issuing this command？（）  

• A、 After two days，a backup will be marked obsolete
• B、 After two days，a backup will be deleted from the media
• C、 If the RMAN repository has records of two or more recent backups of a file，then older backups will be deleted from the media.
• D、 If the RMAN repository has records of two or more recent backups of a file then older backups will be marked obsolete.

第17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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