载体蛋白，又称为通透酶，它象酶一样，不能改变反应平衡，只能增加达到反应平衡的速度；但与酶不同的

，respectively.Fromthetablespacespaceusagemetrics，youfindthattheactualspaceusagehasreachedthespecifiedwarningthresholdvalue，butnoalertshavebeengenerated.Whatcouldbethereasonforthis？（）

A.TheEVENTparameterwasnotset.

B.TheSQL_TRACEparameterissettoFALSE

C.TheEnterpriseManagerGridControlisnotused.

D.TheSTATISTICS_LEVELparameterissettoBASIC

E.TheTIMED_STATISTICSparameterissettoFALSE

YourdatabaseisrunningInARCIIIVELOGmode.Oneofthedatafiles，USBRDATAOI.DBF，intheuserstablespaceisdamagedandyouneedtorecoverthefileuntilthepointoffailure.Thebackupforthedatafileisavailable.Whichthreefileswouldbeusedintheuser-managedrecoveryprocessperformedbythedatabaseadministrator（DBA）？（）

A.redologs

B.controlfile

C.temporaryfilesoftemporarytablespace

D.thelatestbackupofonlythedamageddatafile

E.thelatestbackupofallthedatafilesIntheUSERStablespace

A.recoverycatalog

B.OracleEnterpriseManagerRepository

C.AutomaticWorkloadRepository（AWR）

D.Oracle10gEnterpriseManagerGridControl

E.AutomaticDatabaseDiagnosticMonitor（ADDM）

YouconfiguredthedefaultbackupdevicetypeasdiskforRMANbackups.Inyourdatabase，becauseofbusinessrequirements，youhavetotakeasimultaneousduplicatebackupofthedatafileswhentheRMANBACKUPcommandisused.WhatmustyousetusingtheRMANCONFIGUREcommandtoachievethis？（）

A.MAXSETSIZETO2

B.DEVICETYPEDISKPARALLELISM2

C.RETENTIONPOLICYTOREDUNDANCY2

D.DATAFILEBACKUPCOPIESFORDEVICETYPEDISKTO2

A.function

B.package

C.procedure

D.databasetrigger

E.anonymousPL/SQLblock

A. It bypasses the OS file system cache.

B. A separate NFS interface is required for use across Linux, UNIX, and Windows platforms.

C. It uses the operating system kernel NFS layer for user tasks and network communication modules.

D. File systems need not be mounted by the kernel NFS system when being served through Direct NFS.

E. Oracle Disk Manager can manage NFS on its own, without using the operating system kernel NFS driver.

for a SQL statement but does not find a matching plan in the SQL plan baseline.Which two operations are performed by the optimizer in this scenario?（）

A. The optimizer adds the new plan to the plan history.

B. The optimizer selects the new plan for the execution of the SQL statement.

C. The optimizer adds the new plan to the SQL plan baseline as an accepted plan.

D. The optimizer adds the new plan to the SQL plan baseline but not in the ENABLED state.

E. The optimizer costs each of the accepted plans in the SQL plan baseline and picks the one with the lowest cost.

A.YoucanuseRMANstoredscripts.

B.Recoveryisfasterifdataisstoredincataloginadditiontothecontrolfile.

C.YoucanstorebackupInformationofallregistereddatabasesinoneplace.

D.Databasebackupsareautomaticallydeletedwhentheyareolderthanthespecifiedtimeperiod.

A.java.lang.StackOverflowError

B.java.lang.IllegalStateException

C.java.lang.ExceptionInInitializerError

D.java.lang.ArrayIndexOutOfBoundsException

ions：SQL>UPDATEempSETsal=sal*1.15WHEREdeptno=20BeforeSCOTTendsthetransaction，userHRwhohastheprivilegesonEMPtableexecutesaquerytofetchthesalarydetailsbutfindstheoldsalaryvaluesinsteadoftheincreasedvalues.WhydoesHRstillseetheolddata？（）

A.becauseofredodatafromredologfile

B.becauseofdatafromdatabasebuffercache

C.becauseofdatafromatemporarytablespace

D.becauseofundodatafromtheundotablespace