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IntheeventofaGSSfailureinaGSScluster,whichistrue?()
A.ThecurrentconnectionsarereroutedviathebackupGSS
B.SecondaryGSScannotbeusedtoconfiguretheGSScluster
C.AllremainingGSSsintheclustercontinuerespondingtoanynewqueries
D.AllrecordsintheGSSdatabaseareflushedandreconstructedagainusinganewmasterGSS
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更多 “ IntheeventofaGSSfailureinaGSScluster,whichistrue?() A.ThecurrentconnectionsarereroutedviathebackupGSSB.SecondaryGSScannotbeusedtoconfiguretheGSSclusterC.AllremainingGSSsintheclustercontinuerespondingtoanynewqueriesD.AllrecordsintheGSSdatabaseareflushedandreconstructedagainusinganewmasterGSS ” 相关考题
考题
GiventhatsessionisavalidHttpSessionobject:Intmax=session.getAttribute(MyReallyLongName”);Whichistrue?()
A.Thevaluereturnedneedstobecasttoanint.B.ThegetAttributemethostakestwoarguments.C.PrimitiveCANNOTbestoredintheHttpSession.D.TheHttpSessionattributenamemustNOTexceedeightcharacters.
考题
GiventheTag:AssumingthetagreferencedbymyTags:getAdviceusestheClassiceventmodel,whichistrue?()
A.ThedoAfterBodymethodiscalled.B.ThedoEndTagmethodisNOTcalled.C.ThetypeattributemaybespecifiedintheTLDD.ThedoStartTagMethodmustalwaysreturnSKIP_BODY.E.TheTLDforthistagmustNOTincludeatag.
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publicclassPerson{2.privateStringname;3.publicPerson(Stringname){this.name=name;}4.publicbooleanequals(Personp){5.returnp.name.equals(this.name);6.}7.}Whichistrue?()
A.TheequalsmethoddoesNOTproperlyoverridetheObject.equalsmethod.B.Compilationfailsbecausetheprivateattributep.namecannotbeaccessedinline5.C.Toworkcorrectlywithhash-baseddatastructures，thisclassmustalsoimplementthehashCodemethod.D.WhenaddingPersonobjectstoajava.util.Setcollection，theequalsmethodinline4willpreventduplicates.
考题
publicclassPerson{privatename;publicPerson(Stringname){this.name=name;}publicbooleanequals(Objecto){if(!oinstanceofPerson)returnfalse;Personp=(Person)o;returnp.name.equals(this.name);}}Whichistrue?()
A.CompilationfailsbecausethehashCodemethodisnotoverridden.B.AHashSetcouldcontainmultiplePersonobjectswiththesamename.C.AllPersonobjectswillhavethesamehashcodebecausethehashCodemethodisnotoverridden.D.IfaHashSetcontainsmorethanonePersonobjectwithname=”Fred”，thenremovinganother person，alsowithname=”Fred”，willremovethemall.
考题
classClassA{publicintnumberOfinstances；protectedClassA（intnumberOfinstances）{this.numberOflnstances=numberOfinstances；}}publicclassExtendedAextendsClassA{privateExtendedA（intnumberOfinstances）{super（numberOflnstances）；}publicstaticvoidmain（String[]args）{ExtendedAext=newExtendedA（420）；System.out.print（ext.numberOflnstances）；}}Whichistrue？（）A.420istheoutput.B.Anexceptionisthrownatruntime.C.Allconstructorsmustbedeclaredpublic.D.ConstructorsCANNOTusetheprivatemodifier.E.ConstructorsCANNOTusetheprotectedmodifier.
考题
classSuperClass{2.publicageta(){3.returnnewa();4.}5.}6.classSubClassextendsSuperClass{7.publicbgeta(){8.returnnewb();9.}10.}Whichistrue?()
A.Compilationwillsucceedifaextendsb.B.Compilationwillsucceedifbextendsa.C.Compilationwillalwaysfailbecauseofanerrorinline7.D.Compilationwillalwaysfailbecauseofanerrorinline8.
考题
voidwaitForSignal(){Objectobj=newObject();synchronized(Thread.currentThread()){obj.wait();obj.notify();}}Whichistrue?()
A.ThiscodemaythrowanInterruptedException.B.ThiscodemaythrowanIllegalStateException.C.ThiscodemaythrowaTimeoutExceptionaftertenminutes.D.Thiscodewillnotcompileunless“obj.wait（）”isreplacedwith“（（Thread）obj）.wait（）”.E.Reversingtheorderofobj.wait（）andobj.notify（）maycausethismethodtocompletenormally.F.Acalltonotify（）ornotifyAll（）fromanotherthreadmaycausethismethodtocompletenormally.
考题
publicclassTestSevenextendsThread{privatestaticintx;publicsynchronizedvoiddoThings(){intcurrent=x;current＋＋;x=current;}publicvoidrun(){doThings();}}Whichistrue?()
A.Compilationfails.B.Anexceptionisthrownatruntime.C.Synchronizingtherun（）methodwouldmaketheclassthread-safe.D.Thedatainvariable“x”areprotectedfromconcurrentaccessproblems.E.DeclaringthedoThings（）methodasstaticwouldmaketheclassthread-safe.F.WrappingthestatementswithindoThings（）inasynchronized（newObject（））{}blockwouldmaketheclassthread-safe.
考题
Giventhismethodinaclass:publicStringtoString(){StringBufferbuffer=newStringBuffer();buffer.append(??);buffer.append(this.name);buffer.append(??);returnbuffer.toString();}Whichistrue?()
A.ThiscodeisNOTthread-safe.B.TheprogrammercanreplaceStringBufferwithStringBuilderwithnootherchanges.C.ThiscodewillperformwellandconvertingthecodetouseStringBuilderwillnotenhancetheperformance.D.Thiscodewillperformpoorly.Forbetterperformance，thecodeshouldberewritten：return““+this.name+“”；
考题
23.intz=5；24.25.publicvoidstuff1（intx）{26.assert（x0）；27.switch（x）{28.case2：x=3；29.default：assertfalse；}}30.31.privatevoidstuff2（inty）{assert（y0）；}32.33.privatevoidstuff3（）{assert（stuff4O）；}34.35.privatebooleanstuff4（）{z=6；returnfalse；}Whichistrue？（）A.Alloftheassertstatementsareusedappropriately.B.Onlytheassertstatementonline31isusedappropriately.C.Theassertstatementsonlines29and31areusedappropriately.D.Theassertstatementsonlines26and29areusedappropriately.E.Theassertstatementsonlines29and33areusedappropriately.F.Theassertstatementsonlines29，31，and33areusedappropriately.G.Theassertstatementsonlines26，29，and31areusedappropriately.
考题
publicclassPerson{privatename;publicPerson(Stringname){this.name=name;}publicinthashCode(){return420;}}Whichistrue?()
A.ThetimetofindthevaluefromHashMapwithaPersonkeydependsonthesizeofthemap.B.DeletingaPersonkeyfromaHashMapwilldeleteallmapentriesforallkeysoftypePerson.C.InsertingasecondPersonobjectintoaHashSetwillcausethefirstPersonobjecttoberemovedasaduplicate.D.ThetimetodeterminewhetheraPersonobjectiscontainedinaHashSetisconstantanddoesNOTdependonthesizeofthemap.
考题
publicclassCreditCard{privateStringcardlD；privateIntegerlimit；publicStringownerName；publicvoidsetCardlnformation（StringcardlD，StringownerName，28.Integerlimit）{this.cardlD=cardlD；this.ownerName=ownerName；this.limit=limit；}}Whichistrue？（）A.Theclassisfullyencapsulated.B.Thecodedemonstratespolymorphism.C.TheownerNamevariablebreaksencapsulation.D.ThecardlDandlimitvariablesbreakpolymorphism.E.ThesetCardlnformationmethodbreaksencapsulation.
考题
Refertotheexhibit.AccordingtotheequipmenttabinCiscoUCSManager,whichistrue?()
A.Aisanuplinkport，Bisafabricport，Cisaserverport，Disabackplaneport，EisaDCEinterface，andFisavNICB.Aisanuplinkport，Bisaserverport，Cisafabricport，Disabackplaneport，EisaDCEinterface，andFisavNICC.Aisanuplinkport，Bisafabricport，Cisabackplaneport，Disaserverport，EisaDCEinterface，andFisavNICD.Aisanuplinkport，Bisaserverport，Cisafabricport，DisaDCEinterface，Eisabackplaneport，andFisavNICE.Aisanfabricport，Bisadownlinkport，Cisanuplinkport，Disaserverport，EisaVICinterface，andFisavNIC
考题
单选题55.int[]x={1，2，3，4，5}； 56.inty[]=x； 57.System.out.println（y[2]）； Whichistrue？（）A
Line 57 will print the value 2.B
Line 57 will print the value 3.C
Compilation will fail because of an error in line 55.D
Compilation will fail because of an error in line 56.
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