AP Computer Science Principles Premium: 6 Practice Tests + Comprehensive Review + Online Practice (2021)

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TheTrustedNameinTestPrepComputerSciencePrinciplesTas&1)\MWFor2021&2022examsiawyHMComprehensivecontentreviewpe|0y:(ANARWONLINEPRACTICEES\NL*SethReichelsARSLEAethReichelson,\\“ddN:B.S.MechanicalEngineeringfeeUL){lhe

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BARRON'SComputerSciencePrinciplesPREMIUMWITH6PRACTICETESTS

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©Copyright2021,2020byKaplan,Inc.,d/b/aBarron’sEducationalSeriesAllrightsreservedunderInternationalandPan-AmericanCopyrightConventions.Bypaymentoftherequiredfees,youhavebeengrantedthenon-exclusive,non-transferablerighttoaccessandreadthetextofthiseBookonscreen.Nopartofthistextmaybereproduced,transmitted,downloaded,decompiled,reverseengineered,orstoredinorintroducedintoanyinformationstorageandretrievalsystem,inanyformorbyanymeans,whetherelectronicormechanical,nowknownorhereinafterinvented,withouttheexpresswrittenpermissionofthepublisher.PublishedbyKaplan,Inc.,d/b/aBarron’sEducationalSeries750ThirdAvenueNewYork,NY10017www.barronseduc.comISBN:978-1-5062-8040-010987654321Kaplan,Inc.,d/b/aBarron’sEducationalSeriesprintbooksareavailableatspecialquantitydiscountstouseforsalespromotions,employeepremiums,oreducationalpurposes.Formoreinformationortopurchasebooks,pleasecalltheSimon&Schusterspecialsalesdepartmentat866-506-1949.:

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ContentsPrefaceIntroductionGeneralInformationAbouttheExamHintsforTakingtheExamHowtoUseThisBookDIAGNOSTICTESTDiagnosticTestAnswerKeyAnswersExplainedDiagnosticTableMatch1CreatePerformanceTaskGeneralRequirementsProgramRequirementsFullSampleCreatePerformanceTasks2BigIdea1:CreativeDevelopmentComputingInnovations:

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CollaborationHowProgramsFunctionProgramInputDevelopmentProcessCreativeDevelopmentQuestionsAnswerKeyAnswersExplained3Bigldea2:DataBitsRepresentDataNumberSystemsVariousErrorsLossyandLosslessDataCompressionInformationExtractedfromDataPrivacyConcernsDataQuestionsAnswerKeyAnswersExplained4BigIdea3:AlgorithmsandProgrammingWhatIsanAbstraction?MathematicalOperatorsHowtoSolveModulusAssignmentOperatorsListsDisplayOperatorsInputOperatorsRelationalandBooleanOperatorsTheRobot

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TheSwapSearchingAlgorithmsandProgrammingQuestionsAnswerKeyAnswersExplainedBigIdea3:AlgorithmsandProgrammingPart2ProgrammingFlowchartsListsProceduresAlgorithmsandProgrammingQuestionsPart2AnswerKeyAnswersExplained5BigIdea4:ComputerSystemsandNetworksComputingDevicesAutonomousSystemsoftheInternetFaultToleranceEfficiencyofSolutionsComputerSystemsandNetworksQuestionsAnswerKeyAnswersExplained6BigIdea5:ImpactofComputingTheWorldWideWebDigitalDivideBeneficialandHarmfulEffectsHumanBiasCrowdsourcing:

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LegalandEthicalConcernsSafeComputingImpactofComputingQuestionsAnswerKeyAnswersExplainedPRACTICETESTSPracticeTest1AnswerKeyAnswersExplainedPracticeTest2AnswerKeyAnswersExplainedAPPENDIXAppendixACreatePerformanceTaskDirectionsAppendixBCreatePerformanceTaskRubricAppendixCAPComputerSciencePrinciplesExamReferenceSheet:

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Preface!|VhisbookisaimedatstudentstakingtheAPComputerSciencePrinciplesexamandisdesignedtohelpstudentsprepareforexamtopics,regardlessofwhatcomputerlanguageormethodtheyweretaught.Thebookprovidesin-depthinstructionsonhowtocompletetheCreatePerformanceTaskwithfivecompletewrittenandcodedexamples.Wehaveincludedsampleresponsesthatearnhighscoresandsampleresponsesthatearnlowscores.Theprovidedsampleresponsesareintendedtoserveasguidingresourcesonly.DoNOTcopythesampleresponses!TheCollegeBoarddoesrigorouschecksforplagiarism.ThequestionsandexamplesallreflectthestyleofrecentexamquestionsandcovertheessentialknowledgetopicsoutlinedbytheCollegeBoard.Forthebenefitofstudentsandinstructors,wehaveincludedonediagnostictestandtwopracticeexamsinthisbook,withthreemorepracticeexamsavailableonline.AcknowledgmentsThisbookisdedicatedtotheclassof2020.Youwouldhaverockedthistest.

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boa[AREDRafi3FEAKETY43Ese714Psra EmyApy’4{|4i/’i-p4LisaReichelson,Classof2020:

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IntroductionGENERALINFORMATIONABOUTTHEEXAMTheAPComputerSciencePrinciplesexamisatwo-hourmultiple-choiceexamwith70questionscoveringfiveBigIdeasaccompaniedbyaperformancetaskcontainingthreesubmissions.TheCollegeBoardrecommendsyousubmityourperformancetaskonApril15,withaduedateofapproximatelyApril30.AfteryourteachersetsupyourCollegeBoardaccount,youwillbeabletosubmityourperformancetaskstartingDecember3.IrecommendyousubmityourperformancetaskwellbeforetheApril30deadline.BecausetheCollegeBoardisconstantlytweakingthedates,checkforcurrentdatesat https://apstudent.collegeboard.org/apcourse/ap-computer-science-principlesContentofClassPerformancetask:30%ofAPGradeGuaranteed12hoursofclassroomtimetofinishProgramCodeWrittenResponsesVideoofatleastonesignificantpartofyourprogramrunningEndofCourseexam:70%ofAPGrade2hours70multiple-choicequestions,paperandpencilexamCreativeDevelopment10-13%Data17-22%AlgorithmsandProgramming30-35%ComputerSystemsandNetworks11-15%:

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ImpactofComputing21-26%Someexamquestionsmaybealignedtomorethanonelearningobjective.Forexample,aquestiononprogrammingmightimplementanalgorithmandcontainanabstraction.HINTSFORTAKINGTHEEXAMTheMultiple-ChoiceSectionThemultiple-choicequestionsareworth70%ofyourscoreandareadministratedattheendoftheschoolyear.Thereisnopenaltyforwronganswers.Soanswereveryquestion,evenifyouhavetoguess.Youhavealittlemorethan1.7minutesperquestion.Youshouldhaveenoughtimetoanswerallquestionsonthistest,andyouwillmostlikelyhaveenoughtimeattheendtogobacktodifficultquestions.The70questionsarefatiguing.Youshouldpracticeatleastoneofthesampletestsgiveninonesitting.Robotandprogrammingquestionscanbesimplifiedbyhand-tracingthecode.Peoplescoretheperformancetask,whiletheEOCexamisscoredbymachine.Thetestisindependentofthecomputerlanguageused,buttherearebothtext-basedprogrammingquestionsandblock-basedprogrammingquestions.ThePerformanceTaskDetailsonhowtocreateaCollegeBoardaccountandhowtosubmityourperformancetaskcanbefoundathttps://apstudent.collegeboard.org/takingtheexam/about-digital-portfolioCreateTaskAllowyourownintereststodriveyourchoiceofcomputingprogram.Beforeyoustartwriting,makesureyouhavereadandunderstandthequestionsandhowthesequestionsaregraded.Therearesmallchangesinthequestioneachyear,andthenewestversionsofboththequestionsandthescoringo

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criteriacanbefoundathttps://apcentral.collegeboard.org/pdf/ap-csp-student-task-directions.pdfYourprogramcodeshouldrepresenttheresultsofexplorationsthatgobeyondtheexamplespresentedinclass.Again,thedeadlineforsubmissionisApril30.TheCollegeBoardrecommendssubmittingbyApril15.HOWTOUSETHISBOOKExamplesofeachsectionoftheCreatePerformanceTaskaregiveninthisbook.Youshouldnotplagiarizeexamplesbut,instead,usethemasamodelofhowtoscorehighontheCollegeBoardrubric.Sixcompletepracticeexamsareprovidedinthebook.Oneexamisatthestartofthebookandmaybeusedasadiagnostictest.Itisaccompaniedbyadiagnosticchartthatrefersyoutorelatedtopicsinthereviewbook.Twoexamsareattheendofthebook.Eachoftheexamshasananswerkeyanddetailedexplanationsforthemultiple-choicequestions.!

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DiagnosticTestTheexamthatfollowshasthesameformatasthatusedontheactualAPexam.Therearetwowaysyoumayuseit:1.Useitasadiagnostictestbeforeyoustartreviewing.Followingtheanswerkeyisadiagnosticchartthatrelateseachquestiontosectionsthatyoushouldreview.Inaddition,completeexplanationsareprovidedforeachsolution.2.Youcanalsouseitasapracticeexamwhenyouhavecompletedyourreview..

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DiagnosticTestTime:120minutes70questionsDIRECTIONS:Eachofthequestionsorincompletestatementsbelowisfollowedbyfoursuggestedanswersorcompletions.Selecttheonethatisbestineachcaseandrecordyouransweronaseparatesheetofpaper.1.Considerthefollowingcodesegment,whichusesthevariablesaandc.a3a—a+5c<3actaDISPLAY(a)DISPLAY(c)Whatisdisplayedwhenrunningthecodesegment?(A)33(B)38©)113(D)3112.Whenwritingaprogram,whatistrueaboutprogramdocumentation?:

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I.Programdocumentationisusefulwhilewritingtheprogram.II.Programdocumentationisusefulaftertheprogramiswritten.II.Programdocumentationisnotusefulwhenrunspeedisafactor.(A)Tonly(B)TandIIonly(C)IIonly(D)L11,andIII3.Animagestoredonacomputercontainspixelsthatrepresenthowbrightthered,green,andbluevaluesare.Themostcommonformatforpixelsistorepresentthered,green,andblue,using8bits,whichvaryfrom0to255.Ifthecurrentredvalueis10011101,whatwouldbethenewvalueinbinaryiftheredvalueisincreasedby4indecimal?(A)157py(B)0100py(C)10011111(D)10100001py4.Aprogrammeriswritingsoftwareforadiversesetofusers.Whiletheprogramruns,theprogrammerwantstomeettheneedsofallhercustomersandreducepotentialbiasinheralgorithms.Whatwouldbethebenefitofcollaboratingwithcolleagues?(A)Whencollaborating,toomanypeopletrytoleadthegroupandnotenoughmembersarewillingtotakeabackseat,whichwilldelaythereleaseoftheprogram.(B)Conflictsintheworkingstyleswithinthegroupwilldecreasestaffmorale.(C)Withmultiplepeoplelookingovercode,errorscanbequicklyfixed.(D)Multiplepeoplewithdifferentlifeexperiencescanseethecodeandgiveperspectiveonthewaystheoriginalprogrammercandecreasebias.!

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