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？（）

You need to rename a data file of a tablespace. How would you perform this？（）

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You find today’s performance of your production database to be the best ever.  Therefore， you want to be notified in the future whenever the performance degrades by 10% of today’s performance. What is the first step that you would take to ensure this？（）

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You work as a database administrator for Certkiller .com. You are using Recovery Manager （RMAN） to perform backups in your databases.  Which four backup operations can be performed using RMAN？（）

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

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

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You work as a database administrator for Certkiller .com. You need to rename a data file of atablespace.  How would you perform this？（）

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You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode.  Which two options do you have for performing user-managed backups（）

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You notice that the performance of the database has degraded because of frequent checkpoints.  Which twoactions resolve the issue（）

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View the Exhibits. You performed operations on the DEPT4 table as shown in the Exhibit. When you perform the FlashbackVersions Query， you find that the first two updates are not listed. What could be the reason？（） 

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Immediately after adding a new disk to or removing an existing disk from an Automatic StorageManagement （ASM） instance， you find that the performance of the database decreases initially， until the addition or removal process is completed. Performance then gradually returns to normal levels.  Which two activities could you perform to maintain a consistent performance of the database while adding or removing disks？（）

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