You issue the following RMAN command to set a retention poli

第1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

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：

第4题：

You issue the following command：   RMAN>CONFIGURE BACKUP OPTIMIZATION ON；   What is the result of this command on your backups？（）

• A、 An incremental backup strategy will be used automatically.
• B、 Read-only datafiles will not be backed up as long as backups of those files already exist and those backups meet established retention criteria.
• C、 RMAN will configure itself for maximum performance at the cost of CPU.
• D、 RMAN will configure itself for minimal OS/CPU impact at the cost of time to back up the database.
• E、 RMAN will automatically compress backups.

第5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6题：

How would you grant the RVPC user access to specific RMAN database records in the RMAN virtual private catalog？（）  

• A、 Issue the grant command from the SYS user （or equivalent） of the target database.
• B、 Issue the grant command from the SYS user （or equivalent） of the recovery-catalog database.
• C、 Issue the grant command from the recovery catalog-owning schema user account in the recovery catalog.
• D、 Issue the grant command from RMAN when connected to the recovery catalog-owning schema.
• E、 Issue the grant command from RMAN when connected to the target database.

第7题：

Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt：   RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON；   After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）

• A、 when you change the name of a datafile
• B、 when you drop a table from the database
• C、 when you take an export of the database
• D、 when you back up the database using OS utilities
• E、 when you issue an ALTER SYSTEM SWITCH LOGFILE statement
• F、 when you issue a BACKUP command from inside the RMAN run block

第8题：

In Recovery Manager （RMAN）， you set the retention policy to NONE by executing the following command：  CONFIGURE RETENTION POLICY TO NONE;  What would be the impact of this setting？（）

• A、The retention policy is cleared.
• B、RMAN does not consider any backup as obsolete.
• C、The retention policy is set to its default setting of redundancy 1.
• D、The retention policy is set to its default setting of recovery window 7.

第9题：

You executed the following command in Recovery Manager （RMAN）： RMAN> RESTORE CONTROLFILE; Which operation must you perform before this command is executed？（）

• A、back up the control file to trace
• B、bring database to the MOUNT state
• C、open a connection to the RMAN recovery catalog， which contains the RMAN metadata for the target database
• D、set the database ID （DBID）， but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog

第10题：

You are maintaining the PROD database for NetFx Corporation. You have configured controlfile autobackup in your database. At 6：00 P.M. on Monday， you issue the following command：       RMAN>BACKUP DATABASE；  At 8：00 A.M. on Tuesday， you are unable to start the database because all the control files are missing. You decide to restore the control files from the backup by using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command. Which operation should you perform before using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command？（）

• A、 Start the database in the MOUNT stage.
• B、 Back up the control file to trace.
• C、 Set the DBID
• D、 Issue the RECOVER DATABASE command.