Whenperformingadatabaseduplication，whichduplicatedatabaseparameterwouldyousettoensurethattheonlineredologsarecreatedinthecorrectlocation？（）
A. log_file_name_convert
B. convert_log_file_name
C. file_name_convert_log
D. redo_log_file_name_convert
E. logfile_convert_directory
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Which constraint can be defined only at the column level？ （）
A. UNIQUE
B. NOT NULL
CHECK
D. PRIMARY KEY
E. FOREIGN KEY
WhichofthefollowingcanbeusedinconjunctionwithaFlashbackVersionsQuerytofiltertheresults？（）
ArangeofSCNvalues
B. AlistofSCNvalues
C. Astartingandendingtimestamp
D. Minimumandmaximumsequencevalues
E. Alistofsequencevalues
WhichthreestatementsaretrueregardingthelogicalstructureoftheOracledatabase？（）
A. Eachsegmentcontainsoneormoreextents.
B. Multipletablespacescansharesingledatafile.
C. AdatablockisthesmallestunitofI/Ofordatafiles.
D. Itispossibletohavetablespacesofdifferentblocksizesinadatabase.
EachdatablockinthedatabasealwayscorrespondstooneOSblock.
Yourdatabaseisupandrunningandoneofyourthreecontrolfilesisaccidentallyerased.YoustartRMANandrunthefollowingcommand：RESTORECONTROLFILEFROMAUTOBACKUP；Whichofthefollowingstatementsistrue？（）
A. Thecommandrestoresonlythemissingcontrolfile.
B. Thecommandrestoresallthecontrolfiles.
C. Thecommandfailsbecausethedatabaseisrunning.
D. Thisisthecorrectwaytoaddressthisproblem.
E. Thisisnotthecorrectwaytoaddressthisproblem.
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