You work as a database administrator for Supportcenter.cn. Users in the Supportcenter.cn PROD database complain about the slow response of transactions. While investigating the reason you find that the transactions are waiting for the undo segments to be available， and undo retention has been set to zero.  What would you do to overcome this problem？（）

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 work as a database administrator for Certkiller .com. You received the following error while working on your database： ORA-01555： snapshot too old  In which situation would you receive such an error？（）

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You work as a database administrator for Certkiller .com. You enabled tracing while creating a listener to your database.  What additional information is available to you when you enable tracing？（）

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You work as a database administrator for Certkiller .com. You want to configure database backups to be run automatically.  Which tool or utility would you use to achieve this？ （）

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You work as a database administrator for Certkiller .com. Your database is opened in NOARCHIVEKLOG mode. You decide to place the database in ARCHIVELOG mode.  How would you do 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 are working on a very large database. You had performed a binary backup of the control file a month ago. After this you added a few tablespaces， and dropped a couple of tablespaces. This morning， due to hardware failure， you lost all your control files.  How would you recover the database from this situation？（）

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

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You work as a database administrator for Certkiller .com. In your Oracle database10g installation you have set ORACLE_BASE to /u01/app/oracle.  Which objective will be achieved by this setting？（）

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