单项选择题

Youexecutedthefollowingquery：SELECToperation，undo_sql，t……

Youexecutedthefollowingquery：SELECToperation，undo_sql，table_nameFROMflashback_transaction_queryWhichstatementiscorrectregardingthequeryoutput？（）

A.Itwouldreturninformationregardingonlythelastcommittedtransaction.
B.Itwouldreturnonlytheactivetransactionsinalltheundosegmentsinthedatabase.
C.Itwouldreturnonlythecommittedtransactionsinalltheundosegmentsinthedatabase.
D.Itwouldreturnbothactiveandcommittedtransactionsinalltheundosegmentsinthedatabase.
E.Itwouldreturninformationregardingthetransactionsthatbeganandwerecommittedinthelast30minutes.

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单项选择题Givenbelowisalistofscenarios：1）Auserterminateshissessionabnormally.2）Theconnectionbetweentheserverandtheclientapplicationterminatesbecauseofanetworkfailure.3）Aschemaisaccidentallydropped.4）Thetablespaceisaccidentallydroppedfromthedatabase.5）Theharddiskgetscorruptedandthedatafilesinthediskarelost.6）Thedatabaseinstanceabnormallyshutsdownbecauseofpowerfailure.WhichscenariosrequireDBAinterventiontoperformrecovery（）A.1，3，and6B.4，5，and6C.3，4，and5D.1，2，and6

A.2）Theconnectionbetweentheserverandtheclientapplicationterminatesbecauseofanetworkfailure.3）Aschemaisaccidentallydropped.4）Thetablespaceisaccidentallydroppedfromthedatabase.5）Theharddiskgetscorruptedandthedatafilesinthediskarelost.6）Thedatabaseinstanceabnormallyshutsdownbecauseofpowerfailure.WhichscenariosrequireDBAinterventiontoperformrecovery（）
A.1，3，and6
B.4，5，and6
C.3，4，and5
D.1，2，and6

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A.动态重定位
C.
B.静态链接

单项选择题Youarecreatingacontentmanagementsystem（CMS）&ensp

A.TheJSPthatdisplaysagivendocumentintheCMShasthefollowinggeneralstructure：
B.<%--tagdeclaration--%>
C.<t：document>
D...
E.<t：paragraph>...<t：citationdocID=’xyz’/>...</t：paragraph>...
F.</t：document>
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A.StackOverflowError
B.NullPointerException
C.NumberFormatException
D.IllegalArgumentException
E.ExceptionlnlnitializerError

单项选择题10.interfaceFoo{}11.classAlphaimplementsFoo{}12.classBetaextendsAlpha{}13.classDeltaextendsBeta{14.publicstaticvoidmain（String[]args）{15.Betax=newBeta（）；16. insertcodehere17.}18.}Whichcode，insertedatline16，willcauseajava.lang.ClassCastException？（）A.Alphaa=x；B.Foof=（Delta）x；C.Foof=（Alpha）x；D.Betab=（Beta）（Alpha）x；

A.interfaceFoo{}11.classAlphaimplementsFoo{}12.classBetaextendsAlpha{}13.classDeltaextendsBeta{14.publicstaticvoidmain（String[]args）{15.Betax=newBeta（）；16.//insertcodehere17.}18.}Whichcode，insertedatline16，willcauseajava.lang.ClassCastException？（）
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