SCJP认证考试历年真题1

SCJP认证考试历年真题

我在网上见到很多关于SCJP考试的说法，很多人说他简单！

确实是这样的!但是这种说法只是当你拿到拿仅有的一套题

的时候，你可以这样说!有人说他考的相当全面,确实是这样

的，当你看到这一两百套题给你的时候，你就会有此感悟!呵

呵!头晕啊!它考的好多地方都是你在看资料的时候不留心

的地方你得不时的翻箱倒柜的找资料!这第2套题有147道

题，你可以将它收集起来!当你留心看的时候,你的心就宛如

一团乱麻,天那,这考的什么?想学真本事,就静下心,仔细研

究吧！！！这是19-50题！

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QuestionNo19

Given:

8.intindex=1;

9.boolean[]test=newBoolean[3];

10.booleanfoo=test[index];

Whatistheresult?

A.Foohasthevalueof0.

B.Foohasthevalueofnull.

C.Foohasthevalueoftrue.

D.Foohasthevalueoffalse.

E.Anexceptionisthrown.

F.Thecodewillnotcompile.

Answer:D

QuestionNo20

Given:

1.publicclasstest(

2.publicstaticvoidmain(string[]args){

3.stringfoo=args[1];

4.stringfoo=args[2];

5.stringfoo=args[3];

6.)

7.)

Andcommandlineinvocation:

JavaTestredgreenblue

Whatistheresult?

A.Bazhasthevalueof””

B.Bazhasthevalueofnul1

C.Bazhasthevalueof"red"

D.Bazhasthevalueof"blue"

E.Baxhasthevalueof“green”

F.Thecodedoesnotcompile.

G.Theprogramthrowsanexception.

Answer:G

QuestionNo21

Given:

8.intindex=1;

9.int[]foo=newint[3];

10.intbar=foo[index];

11.intbaz=bar+index;

Whatistheresult?

A.Bazhasthevalueof0

B.Bazhasthevalueof1

C.Bazhasthevalueof2

D.Anexceptionisthrown.

E.Thecodewillnotcompile.

Answer:B

QuestionNo22

Given:

1.publicclassfoo{

2.publiestaticvoidmain(String[]args)

3.Strings;

4.system.out.printin("s="+s);

5.}

6.)

Whatistheresult?

A.Thecodecompilesand“s=”isprinted.

B.Thecodecompilesand“s=null”isprinted.

C.Thecodedoesnotcompilebecausestringsisnot

initialized.

D.Thecodedoesnotcompilebecausestringscannot

bereferenced.

E.Thecodecompiles,butaNullPointerExceptionis

thrownwhentoStringiscalled.

Answer:C

QuestionNo23

Whichwilldeclareamethodthatforcesasubclassto

implementit?

A.PublicdoublemethodaO;

B.Staticvoidmethoda(doubledl){}

C.PublicnativedoublemethodaO;

D.AbstractpublicvoidmethodaO;

E.Protectedvoidmethoda(doubledl){}

Answer:D

QuestionNo24

Youwantsubclassesinanypackagetohaveaccessto

membersofasuperclass.Whichisthemost

restrictiveaccessmodifierthatwillaccomplishthis

objective?

A.Public

B.Private

C.Protected

D.Transient

E.Noaccessmodifierisqualified

Answer:C

QuestionNo25

Given:

1.abstractclassabstrctlt{

2.abstractfloatgetFloat();

3.)

4.publicclassAbstractTestextendsAbstractlt{

5.privatefloatfl=1.Of;

6.privatefloatgetFloat(){returnfl;}

7.)

Whatistheresult?

A.Compilationissuccessful.

B.Anerroronline6causesaruntimefailure.

C.Anerroratline6causescompilationtofail.

D.Anerroratline2causescompilationtofail.

Answer:C

QuestionNo26

Exhibit:

1.publicclasstest(

2.publicintaMethod()[

3.staticinti=0;

4.i++;

5.returnI;

6.)

7.publiestaticvoidmain(Stringargs[]){

8.testtest=newtest();

9.test.aMethod();

10.intj=test.aMethod();

11.System,out.printin(j);

12.]

13.}

Whatistheresult?

A.Compilationwillfail.

B.Compilationwillsucceedandtheprogramwillprint

ar\”

C.Compilationwillsucceedandtheprogramwillprint

“］，，

D.Compilationwillsucceedandtheprogramwillprint

“2”

Answer:D

QuestionNo27

Given:

1.classsuper{

2.publicfloatgetNumO{return3.Of;}

3.)

4.

5.publieclassSubextendsSuper{

6.

7.)

Whichmethod,placedatline6,willcauseacompiler

error?

A.PublicfloatgetNumO{return4.Of;}

B.PublicvoidgetNum(){}

C.PublicvoidgetNum(doubled){}

D.PublicdoublegetNum(floatd){retrun4.Of;}

Answer:B

QuestionNo28

Whichdeclarationpreventscreatingasubclassofan

outerclass?

A.StaticclassFooBar{}

B.PrivateclassFooBar{}

C.AbstractpublicclassFooBar{}

D.FinalpublicclassFooBar{}

E.FinalabstractclassFooBar{}

Answer:D

QuestionNo29

Given:

1.byte口arryl,array2[];

2.bytearray3[]口；

3.byte[][]array4;

Ifeacharrayhasbeeninitialized,whichstatement

willcauseacompilererror?

A.Array2=array1;

B.Array2:array3;

C.Array2=array4;

D.BothAandB

E.BothAandC

F.BothBandC

Answer:F

QuestionNo30

Exhibit:

1.classsuper(

2.publieint1=0;

3.

4.publicsuper(stringtext)(

5.I=1

6.)

7.)

8.

9.publicclasssubextendssuper(

10.publicsub(stringtext)(

11.i=2

12.)

13.

14.publicstaticvoidmain(straingargs[])(

15.subsub=newsub("Hello");

16.system,out.Printin(sub.i);

17.)

18.)

Whatistheresult?

A.Compilationwillfail.

B.Compilationwillsucceedandtheprogramwillprint

“0”

C.Compilationwillsucceedandtheprogramwillprint

a］，，

D.Compilationwillsucceedandtheprogramwillprint

“2”

Answer:A

QuestionNo31

Given:

1.publicclassreturnlt(

2.returnTypemethodA(bytex,doubley)(

3.return(short)x/y*2;

4.)

5.)

WhatisthevalidreturnTypeformethodAinline2?

A.Int

B.Byte

C.Long

D.Short

E.Float

F.Double

Answer:F

QuestionNo32

GiventheActionEvent,whichmethodallowsyouto

identifytheaffectedcomponent?

A.GetClass.

B.GetTarget.

C.GetSource.

D.GetComponent.

E.GetTargetComponent.

Answer:C

QuestionNo33

WhichisamethodoftheMouseMotionListenerinterface?

A.PublicvoidmouseMoved(MouseEvent)

B.PublicbooleanmouseMoved(MouseEvent)

C.PublicvoidmouseMoved(MouseMotionEvent)

D.PublicbooleanMouseMoved(MouseMotionEvent)

E.PublicbooleanmouseMoved(MouseMotionEvent)

Answer:A

QuestionNo34

Exhibit:

1.importjava,awt*;

2.

3.publicclassXextendsFrame(

4.publicstaticvoidmain(string[]args)(

5.Xx=newX();

6.X.pack();

7.x.setVisible(true);

8.)

9.

10.publicX()(

11.setlayout(newGridLayout(2,2));

12.

13.Panelpl=newpanel();

14.Add(pl);

15.Buttonbl=newButton(“One”);

16.Pl.add(bl);

17.

18.Panelp2=newpanel();

19.Add(p2);

20.Buttonb2=newButton("Two”);

21.P2.add(b2);

22.

23.Buttonb3=newButton("Three");

24.add(b3);

25.

26.Buttonb4=newButton(“Four”);

27.add(b4);

28.)

29.)

Whichtwostatementsaretrue?(ChooseTwo)

A.Allthebuttonschangeheightiftheframeheight

isresized.

B.AllthebuttonschangewidthiftheFramewidthis

resized.

C.Thesizeofthebuttonlabeled"One”isconstant

eveniftheFrameisresized.

D.Bothwidthandheightofthebuttonlabeled“Three”

mightchangeiftheFrameisresized.

Answer:C,D

QuestionNo35

Youareassignedthetaskofbuildingapanelcontaining

aTextAreaatthetop,alabeldirectlybelowit,

andabuttondirectlybelowthelabel.Ifthethree

componentsareaddeddirectlytothepanel.Which

layoutmanagercanthepanelusetoensurethatthe

TextAreaabsorbsallofthefreeverticalspacewhen

thepanelisresized?

A.GridLayout.

B.CardLayout.

C.FlowLayout.

D.BorderLayout.

E.GridBagLayout.

Answer:E

QuestionNo36

Whichgetsthenameoftheparentdirectoryfile

“file,txt”?

A.Stringname=File.getParentName("file.txt");

B.Stringname=(newFile("file.txt")).getParent();

C.Stringname=(new

File(“file,txt")).getParentName();

D.Stringname二(new

File("file,txt")).getParentFile();

E.Directorydir=(newFile

(file,txtv)).getParentDir();

Stringname=dir.getName();

Answer:B

QuestionNo37

WhichcanbeusedtoencodecharSforoutput?

A.Java.io.Outputstream.

B.Java.io.OutputStreamWriter.

C.Java.io.EncodeOutputStream.

D.Java.io.EncodeWriter.

E.Java.io.BufferedOutputStream.

Answer:B

QuestionNo38

Thefile“file.txt“existsonthefilesystemand

contsinsASCIItext.

Given:

38.try{

39.Filef=newFile("file.txt");

40.OutputStreamout-newFileOutputStream(f,true);

41.)

42.catch(lOException){}

Whatistheresult?

A.Thecodedoesnotcompile.

B.Thecoderunsandnochangeismadetothefile.

C.Thecoderunsandsetsthelengthofthefileto0.

D.Anexceptionisthrownbecausethefileisnotclosed.

E.Thecoderunsanddeletesthefilefromthefile

system.

Answer:A

QuestionNo39

WhichconstructsaDataOutputStream?

A.NewdataOutputStream("out.txt");

B.NewdataOutputStream(newfile("out.txt"));

C.NewdataOutputStream(newwriter("out.txt"));

D.NewdataOutputStream(newFileWriter("out.txt"));

E.NewdataOutputStream(new

OutputStream("out.txt"));

F.NewdataOutputStream(new

FileOutputStream("out.txt"));

Answer:F

QuestionNo40

Whatwritesthetext""totheendofthefile

“file,txt”?

A.OutputStreamout=newFileOutputStream

(“file,txt");

Out.writeBytes("/n”);

B.OutputStreamos=newFileOutputStream("file.txt”

true);

DataOutputStreamout=newDataOutputStream(os);

out.writeBytes("/n");

C.OutputStreamos=newFileOutputStream

("file,txt");

DataOutputStreamout=newDataOutputStream(os);

out.writeBytes("/n”);

D.OutputStreamos=newOutputStream("file.txt”,

true);

DataOutputStreamout=newDataOutputStream(os);

out.writeBytes("/n");

Answer:B

QuestionNo41

Given:

1.publicclassX(

2.publicobjectm(){

3.objecto=newfloat(3.14F);

4.object[]oa=newobject[1];

5.oa[0]=o;

6.o=null;

7.returnoa[0];

8.)

9.)

Whenisthefloatobjectcreatedinline3,eligible

forgarbagecollection?

A.Justafterline5

B.Justafterline6

C.Justafterline7(thatis,asthemethodreturns)

D.Neverinthismethod.

Answer:D

QuestionNo42

Given:

3.stringfoo="ABCDE”；

4.foo.substring(3);

5.foo.concat("XYZ”);

6.

Typethevalueoffooatline6.

Answer:ABCDE

QuestionNo43

Whichmethodisanappropriatewaytodeterminethe

cosineof42degrees?

A.Doubled=Math,cos(42);

B.Doubled=Math.cosine(42);

C.Doubled=Math,cos(Math.toRadians(42));

D.Doubled=Math,cos(Math.toDegrees(42));

E.Doubled=Math,cosine(Math.toRadians(42));

Answer:C

QuestionNo44

Youneedtostoreelementsinacollectionthat

guaranteesthatnoduplicatesarestoredandall

elements

canbeaccessedinnaturalorder.Whichinterface

providesthatcapability?

A.Java.util.Map.

B.Java.util.Set.

C.Java.util.List.

D.Java.util.StoredSet.

E.Java.util.StoredMap.

F.Java.util.Collection.

Answer:D

QuestionNo45

Whichstatementistruefortheclassjava.util.HashSet?

A.Theelementsinthecollectionareordered.

B.Thecollectionisguaranteedtobeimmutable.

C.Theelementsinthecollectionareguaranteedtobe

unique.

D.Theelementsinthecollectionareaccessedusing

auniquekey.

E.Theelementsinthecollectionsareguaranteedto

besynchronized.

Answer:C

QuestionNo46

Given:

1.publicclassIfTest(

2.publicstaticvoidmain(string[]args){

3.intx=3;

4.inty=1;

5.if(x=y)

6.system,out.println("Notequal");

7.else

8.system.out.printin("Equal");

9.)

10.)

Whatistheresult?

A.Theoutputis“Equal”

B.Theoutputin“NotEqual"

C.Anerroratline5causescompilationtofall.

D.Theprogramexecutesbutdoesnotprintamessage.

Answer:C

QuestionNo47

Exhibit:

1.publicclasstest(

2.publicstaticvoidmain(stringargs[])

3.int1=0;

4.while(i){

5.if(i==4){

6.break;

7.)

8.++i;

9.)

10.

11.)

12.)

Whatisthevalueofiat1ine10?

A.0

B.3

C.4

D.5

E.Thecodewillnotcompile.

Answer:E

QuestionNo48

Given:

3.inti=1,j=10;

4.do(

5.if(i++>-j)continue;

6.)while(i<5);

Afterexecution,whatarethevaluesforIandj?

A.i=6andj=5

B.i=5andj=5

C.i=6andj=4

D.i=5andj=6

E.i=6andj=6

Answer:D

QuestionNo49

Given:

1.switch(i){

2.default:

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-27-

3.System,out.printin("Hello”);

4.)

Whatarethetwoacceptabletypesforthevariablei?

(ChooseTwo)

A.Char

B.Byte

C.Float

D.Double

E.Object

Answer:A,B

QuestionNo50

Given:

1.publicclassfoo{

2.publicstaticvoidmain(string[]args)

3.try{return;}

4.finally{system.out.println(^Finallyv);)

5.}

6.)

Whatistheresult?

A.Theprogramrunsandprintsnothing.

B.Theprogramrunsandprints“Finally”

C.Thecodecompiles,butanexceptionisthrownat

runtime.

D.Thecodewillnotcompilebecausethecatchblock

ismissing.

Answer:B

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QUESTIONNO:92

Given:

1.Stringfoo="blue”;

2.Boolean[]bar=newBoolean[1];

3.if(bar[0]){

4.foo="green”;

5.)

Whatistheresult?

A.Foohasthevalueofa

B.Foohasthevalueofnull.

C.Foohasthevalueof“blue”

D.Foohasthevalueof“green”

E.Anexceptionisthrown.

F.Thecodewillnotcompile.

Answer:F

QUESTIONNO:93

Exhibit:

1.publicclassX{

2.publicstaticvoidmain(String[]args){

3.Stringsi=newString("true");

4.Booleanbl=newBoolean(true);

5.if(s2.equals(bl)){

6.System.out.printin("Equal");

7.)

8.}

9.)

Whatistheresult?

A.Theprogramrunsandprintsnothing.

B.Theprogramrunsandprints“Equal”

C.Anerroratline5causescompilationtofail.

D.Theprogramrunsbutabortswithanexception.

Answer:A

QUESTIONNO:94

Given:

1.publicclassFoo{

2.publicstaticvoidmain(String[]args){

3.inti=1;

4.intj=i++;

5.if((i>++j)&&(i++=j)){

6.i+=j;

7.)

8.)

9.)

Whatisthefinalvalueofi?

A.1

B.2

C.3

D.4

E.5

Answer:B

QUESTIONNO:95

Exhibit:

1.publicclassX{

2.publicstaticvoidmain(String[]args)

3.strings=newstring("Heno”);

4.modify(s);

5.System,out.printin(s);

6.)

7.

8.publiestaticvoidmodify(Strings){

9.s+=“world!”;

10.}

11.)

Whatistheresult?

E.Theprogramrunsandprints“Hello”

F.Anerrorcausescompi1ationtofail.

G.Theprogramrunsandprints“Helloworld!”

H.Theprogramrunsbutabortswithanexception.

Answer:A

QUESTIONNO:96

Whichtwoareequivalent?(ChooseTwo)

A.16>4

B.16/2

C.16*4

D.16»2

E.16/2"2

F.16»>2

Answer:D,F

QUESTIONNO:97

Exhibit:

1.publicclassX{

2.publicstaticvoidmain(String[]args){

3.int□a=newint[1]

4.modify(a);

5.System.out.printin(a[0]);

6.)

7.

8.publicstaticvoidmodify(int[]a){

9.a[0]++;

10.}

11.}

Whatistheresult?

A.Theprogramrunsandprints“0”

B.Theprogramrunsandprints"1”

C.Theprogramrunsbutabortswithanexception.

D.Anerrorupossibleundefinedvariablevatline4

causescompilationtofail.

E.Anerrorupossibleundefinedvariablevatline9

causescompilationtofail.

Answer:B

QUESTIONNO:98

Given:

13.publicclassFoo{

14.publicstaticvoidmain(String口args){

15.StringBuffera=newStringBuffer("A”);

16.StringBufferb=newStringBuffer("B");

17.operate(a,b);

18.system.out.printin{a+“，”+b};

19.)

20.staticvoidoperate(StringBufferx,StringBuffer

y){

21.y.append{x};

22.y=x;

23.)

24.}

Whatistheresult?

A.Thecodecompilesandprints“A,B”.

B.Thecodecompilesandprints“A,BA”.

C.Thecodecompilesandprints“AB,B”.

D.Thecodecompilesandprints“AB,AB”.

E.Thecodecompilesandprints“BA,BA”.

F.Thecodedoesnotcompilebecause“+”cannotbe

overloadedforStringBuffer.

Answer:B

QUESTIONNO:99

Given:

1.publicclassX{

2.publicstaticvoidmain(String口args){

3.byteb=127;

4.bytec=126;

5.byted=b+c;

6.)

7.)

Whichstatementistrue?

A.Compilationsucceedsanddtakesthevalue253.

B.Line5containsanerrorthatpreventscompilation.

C.Line5throwsanexceptionindicating“Outof

range”

D.Line3and4containerrorthatpreventcompilation.

E.Thecompilationsucceedsanddtakesthevalueof

1.

Answer:B

QUESTIONNO:100

Given:

1.publicclassWhileFoo{

2.publiestaticvoidmain(String[]args){

3.intx=1,y=6;

4.while(y一){x一;}

5.system.out.printin("x="+x"y="+y);

6.)

7.)

Whatistheresult?

A.Theoutputisx=6y=0

B.Theoutputisx=7y=0

C.Theoutputisx=6y=-1

D.Theoutputisx=7y=-1

E.Compilationwillfail.

Answer:E

QUESTIONNO:101

Whichstatementistrue?

A.TheErrorclassisauntimeException.

B.NoexceptionsaresubclassesofError.

C.AnystatementthatmaythrowanErrormustbe

enclosedinatryblock.

D.AnystatementthatmaythrowanExceptionmustbe

enclosedinatryblock.

E.AnystatementthatmaythroaruntimeExceptionmust

beenclosedinatryblock.

Answer:D

QUESTIONNO:102

Exhibit:

1.int1=1,j=0

2.

3.switch(i){

4.case2:

5.j+=6;

6.

7.case4:

8.j+=l;

9.

10.default:

11.j+=2;

12.

13.case0:

14.j+=4;

15.}

16.

Whatisthevalueofjat1ine16?

A.0

B.1

C.2

D.4

E.6

Answer:AE

QUESTIONNO:103

Given:

1.switch(i){

2.default:

3.System.out.printin("Hello");

4.)

Whatistheacceptabletypeforthevariablei?

A.Byte

B.Long

C.Float

D.Double

E.Object

F.AandB

G.CandD

Answer:A

QUESTIONNO:104

Youneedtostoreelementsinacollectionthat

guaranteesthatnoduplicatesarestored.Whichtwo

interfacesprovidethatcapability?(ChooseTwo)

A.Java.util.Map

B.Java.util.Set

C.Java.util.List

D.Java.util.StoredSet

E.Java.util.StoredMap

F.Java.util.Collection

Answer:B,D

QUESTIONNO:105

Whichstatementistruefortheclass

java.util.ArrayList?

A.Theelementsinthecollectionareordered.

B.Thecollectionisguaranteedtobeimmutable.

C.Theelementsinthecollectionareguaranteedtobe

unique.

D.Theelementsinthecollectionareaccessedusing

auniquekey.

E.Theelementsinthecollectionsareguaranteedto

besynchronized.

Answer:A

QUESTIONNO:106

Exhibit:

1.publicclassXimplementsRunnable(

2.privateintx;

3.privateinty;

4.

5.publicstaticvoidmain(String[]args)

6.Xthat=newX();

7.(newThread(that)).start();

8.(newThread(that)).start();

9.)

10.

11.publicvoidrun()(

12.for(;;)(

13.x++;

14.y++;

15.System.out.printin("x="+x+”,y="+y);

16.)

17.)

18.)

Whatistheresult?

A.Errorsatlines7and8causecompilationtofail.

B.Theprogramprintspairsofvaluesforxandythat

mightnotalwaysbethesameonthesameline

(forexample,"x=2,y=1").

C.Theprogramprintspairsofvaluesforxandythat

arealwaysthesameonthesameline(for

example,"x=l,y=l”.Inaddition,eachvalueappears

twice(forexample,"x=l,y=l"followedby

“x=l,y=l").

D.Theprogramprintspairsofvaluesforxandythat

arealwaysthesameonthesameline(for

example,"x=l,y=l”.Inaddition,eachvalueappears

onlyforonce(forexample,"x=l,y=1"

followedby“x=2,y=2").

Answer:D

QUESTIONNO:107

Given:

1.publicclassSyncTest{

2.privateintx;

3.privateinty;

4.publicsynchronizedvoidsetX(inti)(x=l;)

5.publicsynchronizedvoidsetY(inti)(y=l;)

6.publicsynchronizedvoidsetXY(int1)(setX(i);

setY⑴；)

7.publicsynchronizedBooleancheck()(returnx!=y;)

8.)

Underwhichconditionswillcheck()returntruewhen

calledfromadifferentclass?

A.Check()canneverreturntrue.

B.Check()canreturntruewhensetXYiscalledby

multiplethreads.

C.Check()canreturntruewhenmultiplethreadscall

setXandsetYseparately.

D.Check()canonlyreturntrueifSyncTestischanged

toallowxandytobesetseparately.

Answer:A

QUESTIONNO:108

WhichisamethodoftheMouseMotionListenerinterface?

A.PublicvoidmouseDragged(MouseEvent)

B.PublicbooleanmouseDragged(MouseEvent)

C.PublicvoidmouseDragged(MouseMotionEvent)

D.PublicbooleanMouseDragged(MouseMotionEvent)

E.PublicbooleanmouseDragged(MouseMotionEvent)

Answer:A

QUESTIONNO:109

Given:

1.Stringfoo="base”;

2.foo.substring(0,3);

3.foo.concat("ket”);

4.foo+="ball”；

5.

Typethevalueoffooatline8.

Answer:BASEBALL

QUESTIONNO110

Given:

1.publicclassTest{

2.publicstaticvoidleftshift(inti,intj)

3.i«=j;

4.)

5.publicstaticvoidmain(Stringargs[]){

6.inti=4,j=2;

7.leftshift(i,j);

8.System,out.printin(i);

9.}

10.}

Whatistheresult?

A.2

B.4

C.8

D.16

E.Thecodewillnotcompile.

Answer:B

QUESTIONNO111

Given:

1.publieclassFoo{

2.privateintval;

3.publicfoo(intv)(val=v;)}

4.publicstaticvoidmain(String口args){

5.Fooa=newFoo(10);

6.Foob二newFoo(10);

7.Fooc=a;

8.intd=10;

9.doublee=10.0;

10.}

11.)

Whichthreelogicalexpressionevaluatetotrue?

(ChooseThree)

A.(a==c)

B.(d==e)

C.(b==d)

D.(a==b)

E.(b==c)

F.(d==10.0)

Answer:A,B,F

QUESTIONNO112

Exhibit:

1.publicclassX{

2.privatestaticinta;

3.

5.publicstaticvoidmain(String口args){

6.modify(a);

7.)

8.

9.publicstaticvoidmodify(inta){

10.a++;

11.)

12.}

Whatistheresult?

A.Theprogramrunsandprints“0”

B.Theprogramrunsandprints"1”

C.Theprogramrunsbutabortswithanexception.

D.Enerror“possibleundefinedvariablenatline5

causescompilationtofail.

F.Enerror“possibleundefinedvariable“atline10

causescompilationtofail.

Answer:A

QUESTIONNO113

Exhibit:

1.publicclassTest{

2.publicstaticvoidreplacej(stringtext){

3.text,replace(4F);

4.}

5.

6.publicstaticvoidmain(Stringargs[]){

7.stringtext=newString("java”)

8.replacej(text);

9.system,out.printin(text);

10.}

11.)

Whatistheresult?

A.Theprogramprints"lava”

B.Theprogramprints“java”

C.Anerroratline7causescompilationtofail.

D.Compilationsucceedsbuttheprogramthrowsan

exception.

Answer:B

QUESTIONNO114

Whichtwoareequivalent?(ChooseTwo)

A.3/2

B.3<2

C.3*4

D.3«2

E.3*2-2

F.3«<2

Answer:C,D

QUESTIONNO115

Whatisthenumericalrangeofachar?

A.0...32767

B.0...65535

C.-256...255

D.-32768...32767

E.Rangeisplatformdependent.

Answer:B

QUESTIONNO116

Given:

1.publicclassTest{

2.publiestaticvoidmain(String[]args){

3.unsignedbyteb=0;

4.b一;

5.

6.)

7.)

Whatisthevalueofbat1ine5?

A.-1

B.255

C.127

D.Compilationwillfail.

E.Compilationwillsucceedbuttheprogramwillthrow

anexceptionatline4.

Answer:D

QUESTIONNO117

Given:

1.publicclassFoo{

2.publicvoidmain(String[]args){

3.system.out.println(uHelloWorld.n;

4.}

5.}

Whatistheresult?

A.Anexceptionisthrown.

B.Thecodedoesnocompile.

C."HelloWorld."Isprintedtotheterminal.

D.Theprogramexitswithoutprintinganything.

Answer:A

QUESTIONNO118

Given:

1.//pointX

2.publicclassfoo(

3.publicstaticvoidmain(String[]args)throws

Exception{

4.java.io.printWriterout=newjava.io.PrintWriter

(

5.newjava.io.outputStreamWriter(System,out),true;

6.out.printin(^Hellov);

7.)

8.}

WhichstatementatPointXonline1allowsthiscode

tocompileandrun?

A.Importjava.io.*;

B.Includejava.io.

C.Importjava.io.PrintWriter;

D.Includejava.io.PrintWriter;

E.Nostatementisneeded.

Answer:E

QUESTIONNO119

Whichwilldeclareamethodthatisavailabletoall

membersofthesamepackageandcanbereferenced

withoutaninstanceoftheclass?

A.Abstractpublicvoidmethoda();

B.Publicabstractdoublemethoda();

C.Staticvoidmethoda(doubledl){}

D.Publicnativedoublemethoda(){}

E.Protectedvoidmethoda(doubledl){}

Answer:C

QUESTIONNO120

Whichtypeofeventindicatesakeypressedona

java.awt.Component?

A.KeyEvent

B.KeyDownEvent

C.KeyPressEvent

D.KeyTypedEvent

E.KeyPressedEvent

Answer:A

QUESTIONNO121

Exhibit:

1.importjava.awt.*;

2.

3.publicclassXextendsFrame{

4.publicstaticvoidmain(String口args){

5.Xx=newX();

6.x.pack();

7.x.setVisible(true);

8.}

9.

10.publicX(){

11.setLayout(newBordrLayout());

12.Panelp=newPanel();

13.add(p,BorderLayout.NORTH);

14.Buttonb=newButton("North");

15.p.add(b):

16.Buttonb=newButton("South");

17.add(bl,BorderLayout.SOUTH):

18.}

19.}

Whichtwostatementsaretrue?(ChooseTwo)

A.Thebuttonslabeled“North”and"South”will

havethesamewidth.

B.Thebuttonslabeled“North”and"South"will

havethesameheight.

C.Theheightofthebuttonlabeled“North“canvery

iftheFrameisresized.

D.Theheightofthebuttonlabeled“South”canvery

iftheFrameisresized.

E.Thewidthofthebuttonlabeled“North“isconstant

eveniftheFrameisresized.

F.Thewidthofthebuttonlabeled“South“isconstant

eveniftheFrameisresized.

Answer:B,E

QUESTIONNO122

Howcanyoucreatealistenerclassthatreceivesevents

whenthemouseismoved?

A.ByextendingMouseListener.

B.ByimplementingMouseListener.

C.ByextendingMouseMotionListener.

D.ByimplementingMouseMotionListener.

E.EitherbyextendingMouseMotionListener