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[主观题]

Astronomers have learned that the spectacular tails of comets are extremely tenuous bodies

, ______ particles that the pressure of light can bend them.

A．comprising the least

B．composed of such minute

C．composed of very large

D．having so small number of

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第1题

OnMonday,youdroppedtheDEPTtablefromyourschemaandthenyourecreatedtheDEPTtableinyourschema.OnWednesday,youhavearequirementtorestoretheDEPTtablefromtherecyclebin.Whichstatementiscorrect?()

A.YoucanrestoretheDEPTtablebyusingtheOracleFlashbackDropfeature，providedyouusetheRENAMETOclause.

B.YoucanrestoretheDEPTtablebyusingtheOracleFlashbackDropfeatureandasystemgeneratednamewillbeassignedtotherestoredtable.

C.YoucannotrestoretheDEPTtablebyusingtheOracleFlashbackDropfeaturebecauseatablewiththenameDEPTalreadyexistsinyourschema.

D.YoucannotrestoretheDEPTtablebyusingtheOracleFlashbackDropfeaturebecausethecontentsoftherecyclebinarepurgedevery12hoursbydefault.

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第2题

AUMhasbeenretainingabout15minutesworthofundo.Youwanttodoubletheretentionperiod,butnotatthe

AUMhasbeenretainingabout15minutesworthofundo.Youwanttodoubletheretentionperiod，butnotattheexpenseofnewtransactionsfailing.YoudecidetoalterthesystemtosettheparameterUNDO_RETENTION=18000.However，AUMstillretainsonlyabout15minutesworthofundo.Whatistheproblem？（）

A.YouneedtoaltertheundotablespacetoaddtheRETENTIONGUARANTEEsetting.

B.Youneedtoincreasethesizeoftheundotablespace.

C.Theundotablespaceisnotsettoauto-extend.

D.YouneedtoaltertheRecycleBintoaddtheRETENTIONGUARANTEEsetting.

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第3题

YourdatabaseisinNOARCHIVELOGmodeandalogswitchhappensevery20minutes.OnThursdaymorning,media

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A.recoverusingOracleFlashbackDatabasetechnology

B.restorethedatafilesfrombackupandperformacompleterecovery

C.restoreonlythecorrupteddatafileandperformtablespacerecovery

D.restorethedatafilesfrombackupandperformcancelbasedrecovery

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第4题

AusernamedArrenisexecutingthisquery:selecttable_name,operation,undo_sqlfromflashback_trans

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A.GRANTSELECTANYTRANSACTIONTOARREN

B.GRANTSELECTONFLASHBACK_TRANSACTION_QUERYTOARREN

C.GRANTSELECT_ANY_TRANSACTIONTOARREN

D.GRANTFLASHBACKTOARREN

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第5题

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A.1

B.2

C.3

D.4

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第6题

YouareusingOracleDatabase10g.YouperformedanincompleterecoveryofyourdatabaseandopenedthedatabasewiththeRESETLOGSoption.WhatistheeffectofopeningthedatabasewiththeRESETLOGSoption?()

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B.Thisoperationcreatesanewincarnationofthedatabase.

C.Thisoperationmovesalltheredologfilestoadifferentlocation.

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第7题

What recommendations does the SQL Access Advisor provide for optimizing SQL queries?()

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B. partitioning of tables and indexes

C. creation of index-organized tables

D. creation of bitmap, function-based, and B-tree indexes

E. optimization of materialized views for maximum query usage and fast refresh

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第8题

Which statement correctly describes SQL and /SQL*Plus? ()

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D. /SQL manipulates data and table definition in the database; /SQL* Plus does not allow manipulation of values in the database.

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第9题

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第10题

YouexecutedthefollowingcommandinRecoveryManager(RMAN):RMAN>RESTORECONTROLFILEWhichoperationmustyouperformbeforethiscommandisexecuted?()

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D.setthedatabaseID（DBID），butonlyiftheDB_NAMEparameterassociatedwiththetargetdatabaseisuniqueintherecoverycatalog

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