java双语教学考试试卷及答案a

《java双语教学考试试卷及答案a》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、班级学号姓名密封装订线密封装订线密封装订线A卷注意事项：请将各题答案按编号顺序填写到答题卷上，答在试卷上无效。一、单项选择题（1~20每小题1分，21~30每小题2分，共40分）1.WhicharekeywordsinJava?A.NullB.TRUEC.sizeofD.implements2.Considerthefollowingcode:Integers=newInteger(9);Integert=newInteger(9);Longu=newLong(9);Whichtestwouldreturntrue?A.(s.equals(n

2、ewInteger(9))B.(s.equals(9))C.(s==u)D.(s==t)3.Whichstatementofassigningalongtypevariabletoahexadecimalvalueiscorrect?A.longnumber=345L;　　B.longnumber=0345;C.longnumber=0345L;D.longnumber=0x345L;4.Whichlayoutmanagerisusedwhentheframeisresizedthebuttons'spositionintheFramemig

3、htbechanged?A.BorderLayout　　B.FlowLayout　　C.CardLayout　　D.GridLayout5.WhicharenotJavaprimitivetypes?A.short　　B.Boolean　　C.byte　　D.float6.Giventhefollowingcode:　　if(x>0){System.out.println("first");}　　elseif(x>-3){System.out.println("second");}　　else{System.out.println("thir

4、d");}Whichrangeofxvaluewouldprintthestring"second"?　　A.x>0　　B.x>-3　　C.x<=-3　　D.x<=0&x>-37.Giventhefollowingcode:publicclassPerson{intarr[]=newint[10];publicstaticvoidmain(Stringa[]){　　System.out.println(arr[1]);　　}}面向对象程序设计（JAVA）第18页共18页Whichstatementiscorrect?A.Whencompila

5、tionsomeerrorwilloccur.B.Itiscorrectwhencompilationbutwillcauseerrorwhenrunning.C.Theoutputiszero.D.Theoutputisnull.1.Shortanswer:Thedecimalvalueofiis13,theoctalivalueis:A.14B.015C.0x14D.0122.ApublicmembervairablecalledMAX_LENGTHwhichisinttype,thevalueofthevariableremainsco

6、nstantvalue100.Useashortstatementtodefinethevariable.A.publicintMAX_LENGTH=100;　　B.finalintMAX_LENGTH=100;C.finalpublicintMAX_LENGTH=100;　D.publicfinalintMAX_LENGTH=100.3.WhichcorrectlycreateanarrayoffiveemptyStrings?A.Stringa[]={"","","","","",""};B.Stringa[5];C.String[5]a

7、;D.String[]a=newString[5];for(inti=0;i<5;a[i++]=null);4.Giventhefollowingmethodbody:{if(sometest()){unsafe();}else{safe();}}Themethod"unsafe"mightthrowanIOException(whichisnotasubclassofRunTimeException).Whichcorrectlycompletesthemethodofdeclarationwhenaddedatlineone?A.publ

8、icvoidmethodName()throwsExceptionB.publicvoidmethodname()C.publicvoidmethodName()t