十进制正数43的八位二进制反码是（)A．00101011B．10101011C．00110101D．10110101

dmethodtoperformthistask.Thetableinwhichyouplantoloaddataisanimportanttablehavingvariousintegrityconstraintsdefinedonit.Whichconstraintswillremainenabledbydefaultduringthisoperation（）

A.CHECK

B.UNIQUE

C.NOTNULL

D.PRIMARYKEY

E.FOREIGNKEY

A. The Memory Advisor

B. The SQL Tuning Advisor

C. The Undo Advisor

D. The SQL Access Advisor

A.Youperformedrollbackaftercommit.

B.Ifalogswitchoccursinyourdatabase.

C.Thearchiverfailstogenerateanarchivedlogfile.

D.Instancerecoveryfailstofindoneoftheredologfiles.

E.Along-runningqueryisunabletogetread-consistentimage.

F.Ifyouperformmanualundomanagementoperationsinautomode.

seofthechangestothephysicalstructureofyourdatabase，youperformedabackupofthecontrolfiletotrace.Afterthis，youlostonlythecontrolfilesandtheinstanceabortedduetoahardwarefailure.Howwouldyouproceedtorecoverthedatabase？（）

A.Starttheinstanceandopenthedatabase，instancerecoveryautomaticallyrecoverscontrolfiles

B.Createafilebasedonthecontentsofthetracefileandsaveittothecontrolfilelocationsandstartthedatabase

C.Re-createthedatabase（Therecoveryofthecontrolfileisnotpossiblebecauseyouhavelostallthecontrolfiles.）

D.Starttheinstance，intheNOMOUNTstate，re-createthecontrolfileusingtheCREATECONTROLFILEcommandstoredinthetracefile.

E.StarttheinstanceandMOUNTthedatabase，thenre-createthecontrolfileusingtheCREATECONTROLFILEcommandstoredinthetracefile.

t to perform user managed backup for the data files of the HR_DATA tablespace.To accomplish the task, you issued the following command:SQL> ALTER TABLESPACE hi_data BEGIN BACKUP;Which two statements are true in this scenario? （）

A. No transaction on the tablespace is allowed but you can perform queries.

B. The tablespace will automatically come out of backup mode when the file copy is complete.

C. The checkpoint change number is frozen in headers of the data files until the file is removed from backup mode.

D. The database writes the before image of an entire block to the redo stream before modifying. block tor the first time.

Observetheinformationinthecolumns：1.TheSGAa.TextandparsedformsofallSQLstatements2.Thecursorstateb.Run-timememoryvaluesfortheSQLstatement，suchasrowsretrieved3.User-sessiondatac.Securityandresourceusageinformation4.Thestackspaced.LocalvariablesfortheprocessWhichoptionhasthecorrectmatchbetweenthememoryareasandtheircontents（）

A.1-c，2-b，3-d，4-a

B.1-b，2-c，3-d，4-a

C.1-a，2-b，3-c，4-d

D.1-a，2-b，3-d，4-c

A. Create a table view.

B. Create a view in any schema.

C. Create a view in your schema.

D. Create a sequence view in any schema.

E. Create a view that is accessible by everyone.

F. Create a view only of it is based on tables that you created.

sethelistenerisnotresponding.Youwanttoforwardclientconnectrequeststoanotherlistenerifonelistenerisnotresponding.Howdoyouachievethis？（）

A.Enableinstancefailover

B.Configuresharedserver

C.Enabledatabasefailover

D.Enableconnect-timefailover

E.EnableTransparentApplicationFailover（TAF）

A. Segment Advisor

B. SQL Access Advisor

C. Optimizer statistics gathering

D. Automatic SQL Tuning Advisor

E. Automatic Database Diagnostics Monitor

ecustomertableisbeingaccessedbysomeunauthorizedusers.Whichoptionwouldyouusetomonitorthequeriesbeingexecutedonthecustomertable？（）

A.Monitorthealert.logfile

B.Enableserver-sideSQLtracingforusersessions

C.Enablefine-grainedauditingforthecustomertable

D.EnableFine-GrainedAccessControl（FGAC）forthecustomertable

E.WriteadatabasetriggeronthecustomertableontheSELECTevent