单项选择题

If a backup is expired， which of the following is true？（）

A. It can never be used for a restore/recover operation.
B. Oracle will remove the backup set pieces from the flash recovery area.
C. The backup has been used at least once to restore and recover the database.
D. The backup is no longer valid because of a resetlogs operation.
E. The physical backup set pieces are missing from the media.

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多项选择题Whatinformationdoesthereportschemacommandnotprovide？（）

A. Size of the datafiles
B. Size of the tempfiles
C. Date of last backup for datafiles and tempfiles
D. Filenames for each datafile
E. Checkpoint SCN associated with the last RMAN backup

单项选择题Whywouldyouexecutethereportobsoletecommand？（）

A. To list all backups that were no longer available for restore operations
B. To list all backups that had aged beyond the RMAN retention criteria
C. To list all backup set pieces listed in control-file or recovery-catalog metadata that are not on the backup media
D. To list all datafiles that are no longer part of the database and thus do not need to be backed up
E. To list all archived redo logs that are no longer needed for any database recovery

单项选择题Whatistheresultofthiscommand？（）RMAN>Reportneedbackupdays3；

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.

单项选择题What does the output on this report indicate？（） RMAN> report need backup； RMAN retention policy will be applied to the command RMAN retention policy is set to redundancy 1 Report of files with less than 1 redundant backups File #bkps Name 5 0 C： ORACLE ORADATA ORCL MY_DATA_01.DBF

A. The my_data_01.dbf datafile is corrupted and needs to be restored.
B. The my_data_01.dbf datafile has not yet been backed up. This report does not imply that the data in the datafile can not be recovered.
C. The my_data_01.dbf datafile has not yet been backed up. This report implies that the data in the datafile can not be recovered.
D. The my_data_01.dbf datafile no longer meets the retention criteria for backups.
E. Datafile 5 is missing.

单项选择题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 ORADATA ORCL USERS01.DBF

A. There are no backup sets with any backups of the users01.dbf datafile.
B. The users01.dbf datafile has had unrecoverable operations occur in it. It will need to be backed up or some data loss is possible during a recovery.
C. The users01.dbf datafile is corrupted.
D. The users01.dbf datafile backup exceeds the retention criteria.
E. The last backup of the users01.dbf datafile failed and must be rerun.