个笔试题-富基融通科技

1:WhichstatementaboutlistenerisA.MostcomponentallowmultiplelistenerstobeB.Ifmultiplelistenerbeaddtoasinglecomponent,theeventonlyaffectedonelistener.ponentdon?tallowmultiplelistenerstobeadd.Whatistheresultwhenyoucompileandrunthefollowingcode?publicclassThrowsDemo{staticvoid{System.out.println("InsidethrowMethod.");thrownewIllegalAccessException("demo");}publicstaticvoidmain(String{{}catch(IllegalAccessException{System.out.println("Caught"+}}}Whatistheresultwhenyoucompileandrunthefollowingcode?publicclassThrowsDemo{staticvoid{System.out.println("InsidethrowMethod.");thrownewIllegalAccessException("demo");}publicstaticvoidmain(String{{}catch(IllegalAccessException{System.out.println("Caught"+}}}pilationB.Runtimepilesuccessfully,nothingisD.InsidethrowMethod.followedbycaught:java.lang.IllegalAccessExcption:demo3:Considertheclasshierarchyshownbelow:classFourWheelerimplementsDrivingUtilitiesclassCarextendsFourWheelerclassTruckextendsFourWheelerclassBusextendsFourWheelerclassCraneextendsFourWheelerConsiderthefollowingcodebelow:1.DrivingUtilitiesdu;2.FourWheelerfw;TruckmyTruck=new4.du=5.fw=new6.fw=Whichofthestatementsbelowaretrue?Line4willnotcompilebecauseaninterfacecannotrefertoanThecodewillcompileandThecodewillnotcompilewithoutanexplicitcastatline6,becausegoingdownthehierarchywithoutcastingisnotallowed.Thecodewillcompileifweputanexplicitcastatline6butwillthrowanexceptionpublicvoidcreate()myVect=new4)publicvoidcreate()myVect=new4)Givethefollowingjavapublicclasspublicstaticvoidmain(Stringargs[]){staticintx[]=newint[15];}}Whichstatementiscorrected?Givethefollowingjavapublicclasspublicstaticvoidmain(Stringargs[]){staticintx[]=newint[15];}}WhichstatementisA.Whencompile,someerrorwillB.Whenrun,someerrorwillC.OutputisD.OutputisGivethefollowingjavaclass:publicclassExample{staticintx[]=newpublicstaticvoidmain(Stringargs[]){}}Whichstatementiscorrected?Givethefollowingjavaclass:publicclassExample{staticintx[]=newpublicstaticvoidmain(Stringargs[]){}}WhichstatementisA.Whencompile,someerrorwillB.Whenrun,someerrorwillC.OutputisD.OutputisWhatwillhappenwhenyouattempttocompileandrunthefollowingcode?publicclassStatic{{intx=}staticintpublicstaticvoidmain(String{x--System.out.println(x+y+++x);}publicstaticvoid{y=x+++}}Whatwillhappenwhenyouattempttocompileandrunthefollowingcode?publicclassStatic{{intx=}staticintpublicstaticvoidmain(String{System.out.println(x+y+++x);}publicstaticvoid{y=x+++}}A.prints:B.prints:C.prints:D.prints:9:3个阶段、8个子阶段，以下哪一个是正常的开GiventhefollowingclassclassA{protectedinti;A(inti){}}whichofthefollowingwouldbeavalidinnerclassforthisclass?Selectvalidanswer:GiventhefollowingclassclassA{protectedinti;A(inti){}}whichofthefollowingwouldbeavalidinnerclassforthisclass?Selectvalidanswer:A.classB{B.classBextendsA{C.classBextendsA{B(){System.out.println(“i=”+i);}D.classB{classA{}Whichisthemostappropriatecodesnippetthatcanbeinsertedatline18inthefollowingcode?(Assumethatthecodeiscompiledandrunwithassertionsenabled)importpublicclass{privateHashMapcctld;public{cctld=newcctld.put("in","cctld.put("uk","United//more //othermethodspublicStringgetCountry(String{//WhatshouldbeinsertedStringcountry=return 22.Whichisthemostappropriatecodesnippetthatcanbeinsertedatline18inthefollowingcode?(Assumethatthecodeiscompiledandrunwithassertionsenabled)importpublicclass{privateHashMapcctld;{cctld=newcctld.put("in","cctld.put("uk","Unitedcctld.put("au",//more //othermethodspublicStringgetCountry(String{//WhatshouldbeinsertedStringcountry=return 22.assertcountryCode!=assertcountryCode!=null:"Countrycodecannotbenull"assertcctld!=null:"Nocountrycodedataisassertcctld:"NocountrycodedataisThefollowingcodeisentirecontentsofafilecalledExample.java,causespreciselyoneerrorduringcompilation:classSubClassextends}classBaseClass(){Stringstr;publicBaseClass(){publicBaseClass(Strings){publicclassExample{publicvoidSubClasss=newSubClass(“o”);BaseClassb=newBaseClass(“world”);}}WhichlinewouldbecausetheThefollowingcodeisentirecontentsofafilecalledExample.java,causespreciselyoneerrorduringclassSubClassextends}classBaseClass(){Stringstr;publicBaseClass(){publicBaseClass(Strings){publicclasspublicvoidSubClasss=newSubClass(“ BaseClassb=newBaseClass(“world”);}}WhichlinewouldbecausetheD.在运行阶段主要是进行软件14:Whichofthefollowingstatementsarenotlegal?A.longl=B.inti=C.doubled=D.doublet=SelectvalididentifierofJava:Selectvalididentifierof16:Inthefollowingpiecesofcode,whichonewillcompilewithoutanyA.StringBuffersb1="abcd";B.Booleanb=newBoolean("abcd");C.C:byteb=255;D.floatfl=17:Whicharenot 18:常见的stru