module2-类、接口以及枚举

《module2-类、接口以及枚举》由会员上传分享，免费在线阅读，更多相关内容在应用文档-天天文库。

1、CopyrightTarenaCorporation,2008.AllrightsreservedModule2-类、接口以及枚举一、选择题：Question1Given:11.publicinterfaceStatus{12./*insertcodehere*/intMY_VALUE=10;13.}Whichthreearevalidonline12?(Choosethree.)A.finalB.staticC.nativeD.publicE.privateF.abstractG.protectedAnswer:ABDQu

2、estion2Given:10.classFoo{11.staticvoidalpha(){/*morecodehere*/}12.voidbeta(){/*morecodehere*/}13.}Whichtwoaretrue?(Choosetwo.)A.Foo.beta()isavalidinvocationofbeta().B.Foo.alpha()isavalidinvocationofalpha().C.Methodbeta()candirectlycallmethodalpha().D.Methodalpha()c

3、andirectlycallmethodbeta().Answer:BCQuestion3ClicktheExhibitbutton.11.classPayload{12.privateintweight;13.publicPayload(intwt){weight=wt;}14.publicPayload(){}15.publicvoidsetWeight(mtw){weight=w;}16.publicStringtoString{returnInteger.toString(weight);}17.}18.19.pub

4、licclassTestPayload{20.staticvoidchangePayload(Payloadp){21./*insertcodehere*/CopyrightTarenaCorporation,2008.Allrightsreserved22.}23.24.publicstaticvoidmain(String[]args){25.Payloadp=newPayload();26.p.setWeight(1024);27.changePayload(p);28.System.out.println("Thev

5、alueofpis"+p);29.}30.}Whichstatement,placedatline21,causesthecodetoprint“Thevalueofpis420.”?A.p.setWeight(420);B.p.changePayload(420);C.p=newPayload(420);D.Payload.setWeight(420);E.p=Payload.setWeight(420);F.p=newPayload();p.setWeight(420);Answer:AQuestion4Clickthe

6、Exhibitbutton.1.publicclassItem{2.privateStringdesc;3.publicStringgetDescription(){returndesc;}4.publicvoidsetDescription(Stringd){desc=d;}5.6.publicstaticvoidmodifyDesc(Itemitem,Stringdesc){7.item=newItem();8.item.setDescription(desc);9.}10.publicstaticvoidmain(St

7、ring[]args){11.Itemit=newItem();12.it.setDescription("Gobstopper");13.Itemit2=newItem();14.it2.setDescription("Fizzylifting");15.modifyDesc(it,"Scrumdiddlyumptious");16.System.out.println(it.getDescription());17.System.out.println(it2.getDescription());18.}19.}What

8、istheoutcomeofthecode?A.Compilationfails.B.GobstopperFizzyliftingCopyrightTarenaCorporation,2008.AllrightsreservedC.GobstopperScrumdiddlyumptious