Post on 11-Apr-2018
OXFORD CAMBRIDGE AND RSA EXAMINATIONSADVANCED SUBSIDIARY GCE
F451COMPUTING
Computer Fundamentals
THURSDAY 14 JANUARY 2010: AfternoonDURATION: 1 hour 30 minutes
SUITABLE FOR VISUALLY IMPAIRED CANDIDATES
Candidates answer on the Question Paper
OCR SUPPLIED MATERIALS:None
OTHER MATERIALS REQUIRED:None
(KN) MEP10128 23584© OCR 2010 [J/500/7955]
READ INSTRUCTIONS OVERLEAF
CandidateForename
CentreNumber
CandidateNumber
CandidateSurname
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INSTRUCTIONS TO CANDIDATES
• Writeyournameclearlyincapitalletters,yourCentreNumber and Candidate Number in the boxes on the first page.
• Useblackink.Pencilmaybeusedforgraphsanddiagramsonly.
• Readeachquestioncarefullyandmakesurethatyouknowwhatyouhavetodobeforestartingyouranswer.
• AnswerALLthequestions.
• Writeyouranswertoeachquestioninthespaceprovided,howeveradditionalpapermaybeusedifnecessary.
INFORMATION FOR CANDIDATES
• Thenumberofmarksisgiveninbrackets[]attheendofeachquestionorpartquestion.
• Thetotalnumberofmarksforthispaperis100.
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1 (a) (i) Definethetermhardware.
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(ii) Somehardwareitemsarecalledperipherals.
Explainwhatismeantbyaperipheral.
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(b) (i) Definethetermsoftware.
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(ii) Explainthedifferencebetweensystemsoftwareandapplicationssoftware.
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(c) (i) Stateanapplicationofacomputersystemwhichrequiresareal-timeoperatingsystem,justifyingyourchoice.
Application _____________________________
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Justification ____________________________
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(ii) Workersinafactoryeachhaveaswipecardwhichcontainstheiridentificationnumber.Thiscardisswipedthroughareaderwhentheyarriveatworkinthemorningandagainwhentheyleaveatnight.TheworkersarepaidonFridayeachweek.
Explainwhyabatchoperatingsystemisusedtoproducethepayroll.
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2 (a) Whendataistransmittedbetweenmachinesonanetwork,thedatacanbesentusingeitherpacketswitchingorcircuitswitching.
(i) Describewhatismeantbypacketswitching.
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(ii) Describewhatismeantbycircuitswitching.
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(iii) GiveONEadvantageandONEdisadvantageofusingpacketswitchingratherthancircuitswitching.
Advantage ______________________________
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Disadvantage ___________________________
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(b) Describethetransferofafileofdatafromprimarymemorytoastoragedevice.
Thequalityofwrittencommunicationwillbeassessedinyouranswertothisquestion.
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3 Afirmofsolicitorshasbeenusingacomputersystemwhichkeepsrecordsofitsclientsandotherinformationnecessaryfortherunningofthebusiness.
Ithasbeendecidedtoreplacethesystemwithamoreup-to-dateone.
Asystemsanalysthasbeenappointedtosupervisethereplacement.
(a) Thesystemsanalystwillneedtocarryoutafeasibilitystudy.
DescribethefunctionANDpurposeofafeasibilitystudy.
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(b) Theanalystproducesuserandtechnicaldocumentationforthenewsystem.
(i) StateTHREEitemswhichwouldbecontainedintheuserdocumentation.
1 ______________________________________
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2 ______________________________________
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3 ______________________________________
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(ii) DescribeTWOkindsofdiagramwhichmaybeinthetechnicaldocumentation.
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(c) Theclientfilerequirespicturestobestoredtoidentifytheclients.
DescribeTWOmethodsofcapturingthepicturesforthesystem.
Method 1 __________________________________
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Method 2 __________________________________
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(d) Explaintheneedforlegislationtogoverntheuseofcomputersforstoringpersonaldata.
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4 (a) Describewhateachofthefollowingpartsofacomputerdoes.
(i) Controlunit
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(ii) Memoryunit
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(iii) ALU
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(b) Whendataisbeingtransmittedaroundacomputer,busesareused.
NameanddescribethefunctionsofTWO different typesofbus.
Type1 ____________________________________
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Type2 ____________________________________
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5 Alibrarydirectsallmemberstoanareawheretheycanhavetheirloansinputintothecomputersystem.
The membership number is read from the member’s card.
(a) DescribeTWOwaysthatthemembershipnumbercanbeinputtothecomputersystem.
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2 _________________________________________
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(b) DescribeTWOformsofoutputwhichcouldbeproducedbythesystemfollowingtheinputofthemembership number.
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2 _________________________________________
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(c) Untilrecentlytheloanssystemhadbeenamanualone.
Explainthechangestothestaff’sworkexpectationsfollowingtheintroductionofthecomputerisedsystem.
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BLANK PAGE
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6 Anauthorworksfromhomeusingacomputersystem.
Sheusesanumberofpiecesofutilitysoftware. Statethepurposeofeachofthesetypesofutilityand
describehowtheauthorwouldusetheminherwork.
(i) Compressionsoftware
Purpose ___________________________________
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Use ______________________________________
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(ii) Filehandlers
Purpose ___________________________________
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Use ______________________________________
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(iii) Hardwaredrivers
Purpose ___________________________________
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Use ______________________________________
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(iv) Backuputility
Purpose ___________________________________
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Use ______________________________________
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7 (a) (i) Describewhatismeantbythebitrateofdatatransmission.
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(ii) Stateatypeofdatatransmissionwhichwouldrequireahighbitrate,givingreasonsforyourchoice.
Data transmission _______________________
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Reasons _______________________________
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(b) Explainwhyahandshakesignalisnecessary.
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8 (i) Expressthedenarynumber107asan8bitbinarynumber.
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(ii) Expressthedenarynumber107asahexadecimalnumber.
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(iii) Useyourpreviousanswerstoshowtherelationshipbetweenbinaryandhexadecimalnotations.
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