ssd3选择题题库.docx

上传人:b****8 文档编号:12992273 上传时间:2023-06-10 格式:DOCX 页数:13 大小:17.58KB
下载 相关 举报
ssd3选择题题库.docx_第1页
第1页 / 共13页
ssd3选择题题库.docx_第2页
第2页 / 共13页
ssd3选择题题库.docx_第3页
第3页 / 共13页
ssd3选择题题库.docx_第4页
第4页 / 共13页
ssd3选择题题库.docx_第5页
第5页 / 共13页
ssd3选择题题库.docx_第6页
第6页 / 共13页
ssd3选择题题库.docx_第7页
第7页 / 共13页
ssd3选择题题库.docx_第8页
第8页 / 共13页
ssd3选择题题库.docx_第9页
第9页 / 共13页
ssd3选择题题库.docx_第10页
第10页 / 共13页
ssd3选择题题库.docx_第11页
第11页 / 共13页
ssd3选择题题库.docx_第12页
第12页 / 共13页
ssd3选择题题库.docx_第13页
第13页 / 共13页
亲,该文档总共13页,全部预览完了,如果喜欢就下载吧!
下载资源
资源描述

ssd3选择题题库.docx

《ssd3选择题题库.docx》由会员分享,可在线阅读,更多相关《ssd3选择题题库.docx(13页珍藏版)》请在冰点文库上搜索。

ssd3选择题题库.docx

ssd3选择题题库

SSD3选择题题库

methodmustexistineveryJavaapplication

(a)begin

(b)paint

(c)init

(d)main

Correctansweris(d)

2Whichofthefollowingisavalidcharacter

.literalinJava

(a)';'

(b)'<='

(c)"'"

(d)"a"

Correctanswer:

A

Javaidentifiermaybeginwithallbutwhichofthefollowing

(a)$

(b)if

(c)_(theunderscore)

(d)0

Correctansweris(d)

thecontextofJavaprogramming,garbagecollectionrefersto

(a)automaticbalancingofparenthesisperformedbysomeeditors

(b)removalofJavaprogramsthatcouldcausedamagetoasystem

(c)conversionofcommentsintoJavadoccomments

(d)automaticreturnofmemorytotheheapforobjectsnolongerrequiredbytheprogram

Correctansweris(d)

willbeoutputwhenthefollowingJavaprogramsegmentisexecuted

intx=5;

inty=2;

5+2

(b)52

(c)7

(d)52

Correctansweris(c)

5.Whichofthefollowingpartsofanif-else-statementisoptional

(a)theifpart

(b)theelsepart

(c)theparenthesisaroundthecondition

(d)thecondition

Correctansweris(b)

ofthefollowingistheJavaloopconstructtypicallyusedwhentherangeisclear

(a)while-loop

(b)for-loop

(c)switch-loop

(d)do-while-loop

Correctansweris(b)

thefollowingJavaprogramsegment.

import.*;

publicclassTest{

publicTest(){

"default");

}

publicTest(inti){

"non-default");

}

publicstaticvoidmain(String[]args){

Testt=newTest

(2);

}

}

Whichofthefollowingwillbeoutputduringexecutionoftheprogramsegment

(a)Thelineoftext"non-default"followedbythelineoftext"default"

(b)Thelineoftext"default"followedbythelineoftext"non-default"

(c)Thelineoftext"default"

(d)Thelineoftext"non-default"

Correctansweris(d)

isthenameoftheJDKprogramthatprocessesJavadoccomments

(a)java

(b)javac

(c)javacom

(d)javadoc

Correctansweris(d)

totheJavacodeconventions,fileslongerthanlinesshouldbe

(a)100,encouraged

(b)100,avoided

(c)2000,avoided

(d)2000,encouraged

Correctansweris(c)

primitivefloating-pointtypesavailableinJavaareand.

(a)real,double

(b)float,double

(c)real,float

(d)single,real

Correctansweris(b)

manybytesarerequiredtorepresentaUnicodecharacter

(a)Four

(b)One

(c)Three

(d)Two

Correctansweris(d)

manylinesofoutputwillbeproducedbythefollowingcodefragmentfor(inti=0;i<4;++i){

for(intj=1;j<3;++j){

(i+j);

(a)12

(b)6

(c)10

(d)8

Correctansweris(d)

manylinesofoutputwillbeproducedbythefollowingcodefragment

for(inti=0;i<3;++i){

for(intj=0;j

(i+j);

}}

(a)6

(b)4

(c)3

(d)5

Correctansweris(c)

ofthefollowingstatementsaboutclassvariablesinJavaisnottrue

(a)Classvariablesrequirethemodifierstaticinthedeclarations.

(b)

instantiated

inthesame

Allobjectshavetheirowncopyoftheclassvariabledefinedintheclass.

(c)Non-staticmethodsinaclasscanaccesstheclassvariabledefinedclass.

(d)Classvariablesdonotneedthereferencetotheobjectoftheinstantiatedclasstoaccessthem.

Correctansweris(b)

termclassvariableisasynonymfor

(a)aninstancevariable

(b)aread-onlyvariable

(c)aprivatedatafield

(d)astaticdatafield

Correctansweris(d)

ofthefollowingpatternsofcharactersopensaJavadoccommentblock

(a)/**

(b)

intx=5;

inty=2;

+"1"+y);

Whichofthefollowingstatementsistrueabouttheprogramsegment

(a)Theoutputcausedbythecodewillbe512.

(b)Theoutputcausedbythecodewillbe8.

(c)Thecodewillcauseacompilationerror.

(d)Theoutputcausedbythecodewillbe512.

Correctansweris(a)

thefollowingJavaprogramsegment.

import.*;

publicclassSomeClass{

publicvoidx(){

thrownewRuntimeException("Exceptionfromx");

}

publicvoidy(){

thrownewIOException("Exceptionfromy");

}

}

Whichofthefollowingistrueconcerningthedefinitionsforthemethodsxandy

(a)Neitherxnoryhasalegaldefinition.

(b)Bothxandyhavelegaldefinitions.

(c)xhasalegaldefinition,butyhasanillegaldefinition.

(d)xhasanillegaldefinition,butyhasalegaldefinition.

Correctansweris(c)

Java,exceptionsthatarenothandledarepassedupthe

(a)exceptionladder

(b)callstack

(c)catchblocks

(d)blockhierarchy

Correctansweris(b)

atypicaldebuggerencountersabreakpoint,theprogrammerusingthedebuggermayperformwhichofthefollowingactions

1.Examinethevaluesofvariablesinthehaltedprogram

2.Executethecurrentline

3.Resumeexecutionofthehaltedprogram

(a)IIIonly

(b)I,II,andIII

(c)Ionly

(d)IandIIonly

Correctansweris(b)

nameofaJavasourcefile

(a)mustusetheextension.class

(b)mustbethesameastheclassitdefines,respectingcase

(c)mustbethesameastheclassitdefines,ignoringcase

(d)hasnorestrictions

Correctansweris(b)

differencebetweenthemethodsprintandprintlnoftheclassisthat

(a)printlnappendsanewlinetotheendofitsoutput,butprintdoesnot

(b)printappendsanewlinetotheendofitsoutput,butprintlndoesnot

(c)printlninsertsanewlineatthebeginningofitsoutput,butprintdoesnot

(d)printinsertsanewlineatthebeginningofitsoutput,butprintlndoesnotCorrectansweris(a)

istherightwaytohandleabnormalitiesininputonJava

(a)Byhandlingtheseproblemsbyprovidingexceptionhandlers

(b)ByalwaysspecifyingthethrowsclauseineverymethodheaderwherefileI/O

isperformed

(c)ByusingtheclassFileFilterwhichgracefullyfiltersoutbadinputdata

(d)Bywritingwhileloopstoguardagainstbadinput

Correctansweris(a)

Javaexceptionclassesarederivedfromtheclass

(a)answeris(b)

ofthefollowingstatementsistrueoftheconventionsoutlinedbySunMicrosystemsinthedocumententitledCodeConventionsfortheJavaProgrammingLanguage

1.Theydefineastandardinterfacedefinitionlanguagethatmustbeusedforall

Javaclasses.

2.Theyproviderecommendationsintendedtomakesourcecodeeasiertoreadandunderstand.

3.TheydescribeonemechanismfornetworkcommunicationbetweenJavaandC++programs.

(a)IIIonly

(b)I,II,andIII

(c)IIonly

(d)IandIIIonly

Correctansweris(c)

toolthatallowsprogrammerstoexecutelinesofaprogramonelineatatimein

ordertohelplocatethesourceofaprogram'serrorsisknownasa(n)

(a)debugger

(b)stacktrace

(c)exceptionhandler

(d)scope

Correctansweris(a)

ofthefollowingisnottrueconcerningobjectsandtheirrepresentation

(a)objectsarerepresentedbytheiraddresses

(b)objectsarerepresentedbyvalue

(c)objectsarerepresentedbyreference

(d)objectsarerepresentedindirectly

Correctansweris(b)

programming,aloopisgenerallyusedtoachieve

(a)branching

(b)succession

(c)repetition

(d)selection

Correctansweris(c)

aclasscontainsaconstructor,thatconstructorwillbeinvoked

(a)eachtimeanobjectofthatclassgoesoutofscope

(b)onceatthebeginningofanyprogramthatusesthatclass

(c)oncethefirsttimeanobjectofthatclassisinstantiated

(d)eachtimeanobjectofthatclassisinstantiated

Correctansweris(d)ofthefollowingcategorizationscanbeappliedtoboththedatafieldsandthemethodsinaJavaclass

(a)nativeandnon-native

(b)staticandnon-static

(c)defaultandnon-default

(d)abstractandnon-abstract

Correctansweris(b)

10.AccordingtotheJavacodeconventions,filesthatcontainJavasourcecodehave

thesuffix,andcompiledbytecodefileshavethesuffix.

(a).javac,.class

(b).java,.class

(c).class,.javac

(d).class,.java

Correctansweris(b)

ofprimitivetypesarealsoreferredtoas

(a)references

(b)classes

(c)objects

(d)scalars

Correctansweris(d)

onthefollowingdeclaration,whatdoesb1representjustafterthedeclaration

isexecuted

Buttonb1;

(a)a"default"Buttonobject

(b)aButtonobjectwithnolabel

(c)ablankButtonobject

(d)nothing

Correctansweris(d)

8.Thereturntypeforamethodthatreturnsnothingtoitscalleris

(a)notspecifiedinthemethoddefinition

(b)false

(c)null

(d)void

Correctansweris(d)

isthenameofthewrapperclassforthetypeint

(a)Integer

(b)INT

(c)integer

(d)Int

Correctansweris(a)

(*)

3.Whichofthefollowingstatementsis(are)trueabouttheuseofanasteriskinaJavaimportstatement

Itdoesnotincurrun-timeoverhead.

Itcanbeusedtoimportmultiplepackageswithasinglestatement.

Itcanbeusedtoimportmultipleclasseswithasinglestatement.

(a)IIIonly

(b)IandIIIonly

(c)Ionly

(d)I,II,andIII

Correctansweris(b)

4.WhatwillbeoutputcausedbytheexecutionofthefollowingJavaprogramsegment

Stringname="Elvis";

+"washere");

(a)Elviswashere

(b)namewashere

(c)Elviswashere

(d)name+washere

Correctansweris(a)

10.AsanaidindebuggingaprograminJava,printstatementsmaybeusedtodisplaywhichofthefollowingtypesofinformation

Thenamesofmethodsbeingcalled

Thevaluesoftheparametersofamethod

Thevaluesoftheinstancevariablesofaclass

(a)IandIIonly

(b)I,II,andIII

(c)IIandIIIonly

(d)IandIIIonly

Correctansweris(b)

2.WhichpackagedoesnotneedtobeexplicitlyimportedintoaJavaprogram

(a)

(b)

(c)

(d)

Correctansweris(d)

1.

UMLclassdiagramscandescribewhichofthefollowing

Theinternalstructureofclasses

Relationshipsbetweenclasses

(a)None

(b)IIonly

(c)IandII

(d)Ionly

Correctansweris(c)

2.

InaUMLclassdiagram'srepresentationofaclass,thetop,middle,andlowerrectangularcompartmentsrespectivelydescribetheoftheclass.

(a)name,methods,andconstants

(b)name,attributes,andmethods

(b)attributes,methods,andname

(c)attributes,methods,andconstants

Correctansweris(b)

展开阅读全文
相关资源
猜你喜欢
相关搜索
资源标签

当前位置:首页 > 医药卫生 > 药学

copyright@ 2008-2023 冰点文库 网站版权所有

经营许可证编号:鄂ICP备19020893号-2