单选题What is the impact of the results of the output of the following command？（）   RMAN> report unrecoverable database；  Report of files that need backup due to unrecoverable operations  File Type of Backup Required Name  4 full or incremental C:///ORACLE/O

第1题：

Examine the following command used to perform incremental level 0 backup：   RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE；   To enable the block change tracking， after the incremental level 0 backup you issued the following command：   SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ’/mydir/ rman_change_track.f’；To perform incremental level 1 cumulative backup， you issued the following command：   RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE；   Which two statements are true in the above situation？（）

• A、 The block change tracking data will be used only from the next incremental 0 backup.
• B、 The incremental backup will use change tracking data for accomplishing the backup.
• C、 The incremental backup will not use change tracking data for accomplishing the backup.
• D、 The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.

第2题：

You issued the following RMAN command：  RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON；     What is NOT an impact of using the above command？（）

• A、 When a successful backup is recorded in the RMAN repository， then a backup of the current control file is performed.
• B、 When a structural change is made to the database， then a backup of the current control file is performed.
• C、 When a successful backup is performed in the RMAN repository， then a backup of the spfile is performed.
• D、 When a structural change is made to the database， then a backup of the alert log file will be performed.

第3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4题：

You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）

• A、RMAN reads the block change tracking file only when it performs the incremental level 0 backup.
• B、RMAN reads the block change tracking file when it performs both incremental backups.
• C、RMAN reads the block change tracking file only when it performs the incremental level 1 backup.
• D、RMAN does not read the block change tracking file when it performs either incremental backup.

第5题：

You issue the following command on the RMAN prompt.   REPORT NEED BACKUP DAYS 5；   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 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14题：

You executed the following command in 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 three days
• B、 a list of files requiring more than 3 days of archive logs 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 has 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15题：

What is the result of this command？（） RMAN> Report need backup days 3；

• A、 Lists all datafiles created in the last three days that are not backed up.
• B、 Lists all datafiles not recoverable based on the current retention criteria.
• C、 Lists all datafiles not backed up in the last three days. The datafile is not recoverable. 
• D、 Lists all datafiles that need to be backed up due to unrecoverable operations.
• E、 Lists all datafiles not backed up in the last three days. It does not imply that the datafile is not recoverable.

第16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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