单项选择题

You work as a database administrator for Supportcenter.cn. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（）

A.Shut down the instance， copy the control file to the third location and open the database.
B.Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
C.Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.
D.Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
E.Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database.

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单项选择题ThedatafilebelongingtotheSYSTEMtablespaceiscorruptedandnobackupofthefileisavailable.Howdoyourecoverthedatafile？（）

A.The data file cannot be recovered.
B.The date file can be restored from the SYSTEM auto backup.
C.Take thetablespaceoffline，drop，kand re-create it.
D.Recovery Manager （RMAN） is used to recover the data file.
E.The ALTER DATABSE CREATE DATAFILE..commandis used to recover the data file.

单项选择题YouworkasadatabaseadministratorforSupportcenter.cn.Youhavebeenaskedtouseacentralizedadministrativetooltoadministeryourdatabaseserversandapplicationservers.Inordertoachievetheobjective，whichcomponentwouldyouconfigureoneachdatabaseserver？（）

A.Database Control
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单项选择题Yourdatabaseisfunctionalwithpeakloadforonehour.Youwanttopreservetheperformancestatisticscollectedduringthisperiodsothattheycanbeusedforcomparisonwhileanalyzingtheperformanceofthedatabaseinthefuture.Whatactionwouldyoutaketoachievethistask？（）

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