You work as a database administrator at Certkiller .com. In your production database there is a job， CALC_STAT， which has been scheduled to run every Friday at 5.00 p.m. CALC_STATupdates the optimizer statistics for the objects owned by the APPSschema. You want the task to be generic， thereby allowing users to modify the attributes of the task at run time without affecting the original task.Which component of Oracle Scheduler must you define to achieve this？（）

You work as a database administrator for Supportcenter.cn. 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 are working on an Oracle Database 10g database. For which purposes would you use the Flashback Transaction Query feature？ （）

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You are working on an Oracle Database 10g database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true？ （）

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You work as a database administrator for Supportcenter.cn. 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 Supportcenter.cn. 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 Supportcenter.cn. Your database is opened inNOARCHIVEKLOG mode. You decide to place the database in ARCHIVELOG mode. How would you do this？（）

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You work as a database administrator for Supportcenter.cn. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）

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You work as a database administrator for Certkiller .com. You want to create your database with the automatic undo management feature enable.Which two tasks must you perform to achieve this？（）

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You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）

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You are working on a test database where instance recovery takes a considerable amount of time.How can reduce the recovery time？（）

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