面向对象软件工程(使用uml,模式与java)全套课后习题答案

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1、Object-OrientedSoftwareEngineering:UsingUML,Patterns,andJava:SolutionstoExercises1.IntroductiontoSoftwareEngineering:Solutions1-1Whatisthepurposeofmodeling?Thepurposeofmodelingistoreducecomplexitybybuildingasimplifiedrepresentationofrealitywhichignoresirrelevantdetails.Whatisre

2、levantornotisdefinedbythequestionsthemodelwillbeusedtoanswer.1–2Aprogramminglanguageisanotationforrepresentingalgorithmsanddatastructures.Listtwoadvantagesandtwodisadvantagesofusingaprogramminglanguageassolenotationthroughoutthedevelopmentprocess.Advantages:•Developersneedonlyl

3、earnonenotationforalldevelopmentactivities.•Traceabilityamongmodelsandbetweenmodelsandcodeismadeeasiersincetheyarewritteninthesamenotation.Disadvantages:•Aprogramminglanguageisalowlevelnotationwhichisdifficulttouseforrepresentinguserrequirements,forexample.•Aprogramminglanguage

4、enablesandencouragesdeveloperstorepresentimplementationdetailstooearly.1–3Considerataskyouarenotfamiliarwith,suchasdesigningazero-emissionscar.Howwouldyouattacktheproblem?Thisisanopenendedquestionwhosepurposeisforstudentsthinkaboutproblemstheycannotsolvewithouthelp.Answersshou

5、ldcontaintwoormoreofthefollowingpoints:•Definetheproblempreciselybygatheringinformationfrompotentialusers.•Discovertheboundariesofthesolutionspacebygatheringinformationfromapplicationdomainexperts.•Brainstormideaswithotherpeople,includingexpertsandnonexperts•Evaluateideasusingp

6、rototypes,simulations,andcandidateusers.1–4Whatismeantby“knowledgeacquisitionisnotsequential”?Provideaconcreteexampleofknowledgeacquisitionthatillustratesthis.Knowledgeacquisitionisnonlinearinthesensethattheacquisitionofanewpieceofknowledgemayinvalidatepriorknowledge.Inotherte

7、rms,knowingonemorepieceofinformationmayleadyoutorealizethatwhatyouthoughtyouknewisinvalid.GalileoGalileiinvalidatedtheearthcentricmodeloftheuniversebyobservingthemoonsofJupiterandthephasesofVenus.1–5Hypothesizearationaleforthefollowingdesigndecisions:Thisexercisetestsifthestud

8、entunderstandsthedifferencebetweenadecisionanditsrationale.Th