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单项选择题

Whatwritesthetext“”totheendofthefile“file.txt”？（）

A.OutputStreamout=newFileOutputStream（“file.txt”）；
B.writeBytes（“/n”）；
C.OutputStreamos=newFileOutputStream（“file.txt”，true）；
D.writeBytes（“/n”）；
E.OutputStreamos=newFileOutputStream（“file.txt”）；
F.writeBytes（“/n”）；
G.OutputStreamos=newOutputStream（“file.txt”，true）；
H.writeBytes（“/n”）；
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单项选择题publicclassX{publicstaticvoidmain（Stringargs）{inta=newint[1]modify（a）；System.out.printIn（a[0]）；}publicstaticvoidmodify（inta）{a[0]＋＋；}}Whatistheresult？（）

A.Theprogramrunsandprints“0”
B.Theprogramrunsandprints“1”
C.Theprogramrunsbutabortswithanexception.
D.Anerror“possibleundefinedvariable”atline4causescompilationtofail.
E.Anerror“possibleundefinedvariable”atline9causescompilationtofail.

单项选择题classSuper{publicIntegergetLenght（）{returnnewInteger（4）；}}publicclassSubextendsSuper{publicLongGetLenght（）{returnnewLong（5）；}publicstaticvoidmain（String[]args）{Supersooper=newSuper（）；Subsub=newSub（）；System.out.println（sooper.getLenght（）.toString（）+，”+sub.getLenght（）.toString（））；}}Whatistheoutput？（）A.4，4B.4，5C.5，4D.5，5E.Compilationfails.

A.out.println（sooper.getLenght（）.toString（）+，”+sub.getLenght（）.toString（））；}}Whatistheoutput？（）
A.4，4
B.4，5
C.5，4
D.5，5
E.Compilationfails.

单项选择题publicclassArrayTest{publicstaticvoidmain（String[]args）{floatfl[]，f2[]；fl=newfloat[10]；f2=f1；System.out.println（f2[0]=＋f2[0]）；}}Whatistheresult？（）

A.Itprintsf2[0]=0.0.
B.Itprintsf2[0]=NaN.
C.Anerroratline5causescompiletofail.
D.Anerroratline6causescompiletofail.
E.Anerroratline6causesanexpectationatruntime.

单项选择题Youexecutedthefollowingquery：SELECToperation，undo_sql，table_nameFROMflashback_transaction_queryWhichstatementiscorrectregardingthequeryoutput？（）

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

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

单项选择题如果要使装入内存的程序在内存中移动后仍能正常运行，必须要有( )的支持。

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>
G.ThedocumenttaghandlerfollowstheClassictagmodelandthecitationtaghandlerfollowstheSimpletagmodel.Furthermore，thecitationtagcouldalsobeembeddedinothercustomtagsthatcouldhaveeithertheClassicorSimpletaghandlermodel.

单项选择题publicclassClassA{11.publicvoidcount（inti）{12.count（＋＋i）；13.}14.}And：20.ClassAa=newClassA（）；21.a.count（3）；Whichexceptionorerrorshouldbethrownbythevirtualmachine？（）

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？（）
A.Alphaa=x；
B.Foof=（Delta）x；
C.Foof=（Alpha）x；
D.Betab=（Beta）（Alpha）x；

单项选择题YouworkinacompanywhichusesSQLServer2008.Youaretheadministratorofthecompanydatabase.NowyouareinchargeofaSQLServer2008instance.ThereisadatabasenamedDB1intheinstance.TheDB1databaseincludesspatialdatatypes.OnDB1databse,youhavetoperformadatabaseconsistencychecktoincludethespatialindexes.Besidesthis,youmustmakesurethatyoucanreducetheeffectonthedatabaseconcurrencytotheleast.SowhichTransact-SQLstatementshouldyourun?（）A.DBCCCHECKCATALOG(DB1);B.DBCCCHECKALLOC(DB1)WITHTABLOCK;C.DBCCCHECKDB(DB1)WITHTABLOCK,PHYSICAL_ONLY;D.DBCCCHECKDB(DB1)WITHEXTENDED_LOGICAL_CHECKS;

A.Youaretheadministratorofthecompanydatabase.NowyouareinchargeofaSQLServer2008instance.ThereisadatabasenamedDB1intheinstance.TheDB1databaseincludesspatialdatatypes.OnDB1databse,youhavetoperformadatabaseconsistencychecktoincludethespatialindexes.Besidesthis,youmustmakesurethatyoucanreducetheeffectonthedatabaseconcurrencytotheleast.SowhichTransact-SQLstatementshouldyourun?（）
A.DBCCCHECKCATALOG(DB1);
B.DBCCCHECKALLOC(DB1)WITHTABLOCK;
C.DBCCCHECKDB(DB1)WITHTABLOCK,PHYSICAL_ONLY;
D.DBCCCHECKDB(DB1)WITHEXTENDED_LOGICAL_CHECKS;