CWSS Prelim P1 MS

COMMONWEALTHSECONDARYSCHOOLPRELIMINARYEXAMINATION2024 COMPUTINGPaper1MarkScheme(Theory) Name:___________________________________( ) Class:___________ SECONDARYFOUREXPRESS Wednesday28August2024SECONDARYFIVENORMALACADEMIC7155/01 1130–13302hours READTHESEINSTRUCTIONSFIRST Writeyourname,indexnumberandclassonalltheworkyouhandin.Writeindarkblueorblackpen.YoumayuseanHBpencilforanydiagramsorgraphs.Donotusestaples,paperclips,glueorcorrectionfluid. Approvedcalculatorsareallowed.Candidateswillansweronthequestionpaper. Answerallquestions. Thenumberofmarksisgiveninbrackets[]attheendofeachquestionorpartquestion.Youshouldshowallyourworking.Thetotalnumberofmarksforthispaperis80. ForExaminer’sUse Total 80 Thispaperconsistsof13printedpagesincludingthecoverpage.[Turnover

2 1 Acompanydealingwithdigitallocksusesastandardtouchscreenkeypadforitscustomerstoentertheir4-digitpincodestounlockthelocks.(a) Statetworeasonswhythepincodescanbeeasilystolen. 1Fingerprintsfromthetouchscreencanbetracedandusedtoguessthe combination. 24-digitpincodescanbeeasilyfoundthroughguessandcheckalgorithms .......................................................................................................................... [2] (b) Suggesttwowaystoprotectthepincodesfrombeingstolen. 1Useadynamictouchscreenkeypadwhichchangesthelocationsofthe digiteverytime. 2Increasethenumberofdigitsinthepincodetoincreasethenumberof combinations [2] Thecompanyprovidesanonlineserviceforcustomerswhoforgettheirpincodestologintothesystemtoresettheirpincodes. (c) Describethedifferencebetweenauthenticationandauthorisation. Authenticationistheprocessofverifyingtheidentityofauserwhileauthorisationcontrolstheuser’saccesstodataandresources.Authorisationoccursonlyafterauthenticationiscleared. [2] (d) Explainwhyauthenticationisimportantforthisserviceandsuggestonemethodtoenhancetheauthentication. Authenticationhelpstopreventunauthorisedaccesstothesystemandresetthepincodesoftheactualcustomer.Onemethodincludes:passwords,multiple-factorauthentication,securitytokensorbiometrics(Anyone) [2]

3 2 DuringCOVID-19,aruraltownhastousevideo-conferencingserviceformedicalconsultation.Thisincludespatientswholiveinnearbymountainousareas. Describeapositive,negativeandethicalimpactofintroducingthisservice. Positive Patientsinremoteplacesorlimitedmobilityareabletodoe-consultationsandgetdiagnosed.(Accepthackingintovideo-conferencing,retrievingimportantdataduringconferencingandlackofinternetaccessleadingtobeingunabletovideo-conference.DonotacceptAI,3-Dprintingtechnologyorareaofgrowthintechnologyorhackingofsystemandretrievingthemedicaldataasithasnothingtodowithvideo-conferencing) Negative Somepatientsmaypreferthepersonalapproachtomedicineanddistrustthediagnosisgiventhroughe-consults.(Donotacceptmisuseofinformationfrominternetordecreaseinjobs) Ethical Istheservicesafeorisitoktobemonitoredbyunauthorisedpersonnelsuchassystemsadministrators?(Donotacceptrobotsreplacinghumans) [3] 3 Asystemchecksifaplantisgrowinghealthilybycheckingthenumberofdaysit