JAVA程序员基本测试题目.docx

JAVA程序员基本测试题目

第一篇：JAVA程序员基本测试题目PART1：Theessentialofjava1.Giventhefollowingcode,whattestwouldyouneedtoputinplaceofthecommentline?//placetestheretoresultinanoutputofthestringEqualpublicclassEqTest{publicstaticvoidmain(Stringargv[]){EqTeste=newEqTest();}EqTest(){Strings=“Java”;Strings2=“java”;//placetesthere{System.out.println(“Equal”);}else{System.out.println(“Notequal”);}}}A)if(s==s2)B)if(s.equals(s2)C)if(s.equalsIgnoreCase(s2))D)if(s.noCaseMatch(s2))2.GiventhefollowingcodehowcouldyouinvoketheBaseconstructorthatwillprintoutthestring“baseconstructor”;classBase{Base(inti){System.out.println(“baseconstructor”);}Base(){}}publicclassSupextendsBase{publicstaticvoidmain(Stringargv[]){Sups=newSup();//One}Sup(){//Two}publicvoidderived(){//Three}}A.OnthelineAfter//OneputBase(10);B.OnthelineAfter//Oneputsuper(10);C.OnthelineAfter//Twoputsuper(10);D.OnthelineAfter//Threeputsuper(10);3.Whatisthevalueofseasons.lengthforthefollowingarray?String[]seasons={“winter”,“spring”,“summer”,“fall”,};A.undefinedB.3C.4D.54.Whenyouusethenewkeywordtocreateanobject,whereisitcreated?A.HeapB.GarbagecollectorC.QueueD.Stack5.Whatwillhappenifyouattempttocompileandrunthefollowingcode?classBase{}classSubextendsBase{}classSub2extendsBase{}publicclassCEx{publicstaticvoidmain(Stringargv[]){Baseb=newBase();Subs=(Sub)b;}}A.CompileandrunwithouterrorB.CompiletimeExceptionC.RuntimeException6.Anoverriddenmethodcanbeinthesameclass.A.TrueB.False7.Giventhefollowingcodeimportjava.io.*;publicclassTh{publicstaticvoidmain(Stringargv[]){Tht=newTh();t.amethod();}publicvoidamethod(){try{ioCall();}catch(IOExceptionioe){}}}WhatcodewouldbemostlikelyforthebodyoftheioCallmethodA.publicvoidioCall(){DataInputStreamdin=newDataInputStream(System.in);din.readChar();}B.publicvoidioCall()throwIOException{DataInputStreamdin=newDataInputStream(System.in);din.readChar();}C.publicvoidioCall()throwsIOException{DataInputStreamdin=newDataInputStream(System.in);din.readChar();}D.publicvoidioCallthrowsIOException(){DataInputStreamdin=newData