北京宇信易诚科技有限公司招聘JAVA笔试真题及答案.pdf

北京宇信易诚科技有限公司招聘JAVA笔试真题及答案

选择题

1:鉴于Java的特点，它最适合的计算环境是b

A.并行计算环境

B.分布式计算环境

C.高强度计算环境

D.开放式计算环境

2:Whichmethodyoudefineasthestartingpointofnewthreadinaclassfromwhichnewthethread

canbeexcution?b

A.publicvoidstart()

B.publicvoidrun()

C.publicvoidrunnable()

D.publicstaticvoidmain(Stringargs[])

3:Whichstatementaboutlisteneristrue?A什么是Listener

A.Mostcomponentallowmultiplelistenerstobeadded.

B.Ifmultiplelistenerbeaddtoasinglecomponent,theeventonlyaffectedonelistener.

C.Componentdon?tallowmultiplelistenerstobeadd.

D.none

4:软件生命周期的瀑布模型把软件项目分为3个阶段、8个子阶段，以下哪一个是正常的开发顺序?a

A.计划阶段、开发阶段、运行阶段

B.设计阶段、开发阶段、编码阶段

C.设计阶段、编码阶段、维护阶段

D.计划阶段、编码阶段、测试阶段

5:b

1.Whatwillbeprintedwhenyouexecutethefollowingcode?

2.

3.classX

4.{

5.YbnewY();

6.X()

7.{

8.System.out.print(X);

9.}

10.}

11.

12.classY

13.{

14.Y()

15.{

16.System.out.print(Y);

1/10

17.}

18.}

19.

20.publicclassZextendsX

21.{

22.YynewY();

23.Z()

24.{

25.System.out.print(Z);

26.}

27.publicstaticvoidmain(String[]args)

28.{

29.newZ();

30.}

31.}

32.

33.Choices:

A.Z

B.YZ

C.XYZ

D.YXYZ

6:c

1.Givethefollowingmethod:

2.publicvoidmethod(){

3.Stringa,b;

4.anewString(“helloworld”);

5.bnewString(“gameover”);

6.System.out.println(a+b+”ok”);

7.anull;

8.ab;

9.System.out.println(a);

10.}

11.Intheabsenceofcompileroptimization,whichistheearliestpointthe

objectareferedisdefinitelyelibiletobegarbagecollection.

A.beforeline5

B.beforel