![OXFORD CAMBRIDGE AND RSA EXAMINATIONS | ililI ill] llill ...](https://static.fdocuments.in/doc/165x107/627195b46bffa50d6f572f23/oxford-cambridge-and-rsa-examinations-ilili-ill-llill-.jpg)
OXFORD CAMBRIDGE AND RSA EXAMINATIONS | ililI ill] llill ...
OXFORD CAMBRIDGE AND RSA EXAMINATIONS - … CAMBRIDGE AND RSA EXAMINATIONS ADVANCED SUBSIDIARY GCE...
24
OXFORD CAMBRIDGE AND RSA EXAMINATIONS ADVANCED SUBSIDIARY GCE F451 COMPUTING Computer Fundamentals THURSDAY 14 JANUARY 2010: Afternoon DURATION: 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 Candidate Forename Centre Number Candidate Number Candidate Surname
Transcript of OXFORD CAMBRIDGE AND RSA EXAMINATIONS - … CAMBRIDGE AND RSA EXAMINATIONS ADVANCED SUBSIDIARY GCE...
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
2
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.
3
CopyrightInformation
OCRiscommittedtoseekingpermissiontoreproduceallthird-partycontentthatitusesinitsassessmentmaterials.OCRhasattemptedtoidentifyandcontactallcopyrightholderswhoseworkisusedinthispaper.Toavoidtheissueofdisclosureofanswer-relatedinformationtocandidates,allcopyrightacknowledgementsarereproducedintheOCRCopyrightAcknowledgementsBooklet.Thisisproducedforeachseriesofexaminations,isgiventoallschoolsthatreceiveassessmentmaterialandisfreelyavailabletodownloadfromourpublicwebsite(www.ocr.org.uk)aftertheliveexaminationseries.IfOCRhasunwittinglyfailedtocorrectlyacknowledgeorclearanythird-partycontentinthisassessmentmaterial,OCRwillbehappytocorrectitsmistakeattheearliestpossibleopportunity.ForqueriesorfurtherinformationpleasecontacttheCopyrightTeam,FirstFloor,9HillsRoad,CambridgeCB21GE.OCR is part of the Cambridge Assessment Group; Cambridge Assessment isthebrandnameofUniversityofCambridgeLocalExaminationsSyndicate(UCLES),whichisitselfadepartmentoftheUniversityofCambridge.
4
1 (a) (i) Definethetermhardware.
_______________________________________
_______________________________________
_____________________________________ [1]
(ii) Somehardwareitemsarecalledperipherals.
Explainwhatismeantbyaperipheral.
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [2]
(b) (i) Definethetermsoftware.
_______________________________________
_____________________________________ [1]
(ii) Explainthedifferencebetweensystemsoftwareandapplicationssoftware.
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [2]
5
(c) (i) Stateanapplicationofacomputersystemwhichrequiresareal-timeoperatingsystem,justifyingyourchoice.
Application _____________________________
_______________________________________
Justification ____________________________
_____________________________________ [2]
6
(ii) Workersinafactoryeachhaveaswipecardwhichcontainstheiridentificationnumber.Thiscardisswipedthroughareaderwhentheyarriveatworkinthemorningandagainwhentheyleaveatnight.TheworkersarepaidonFridayeachweek.
Explainwhyabatchoperatingsystemisusedtoproducethepayroll.
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [5]
7
2 (a) Whendataistransmittedbetweenmachinesonanetwork,thedatacanbesentusingeitherpacketswitchingorcircuitswitching.
(i) Describewhatismeantbypacketswitching.
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [2]
(ii) Describewhatismeantbycircuitswitching.
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [2]
8
(iii) GiveONEadvantageandONEdisadvantageofusingpacketswitchingratherthancircuitswitching.
Advantage ______________________________
_______________________________________
_______________________________________
Disadvantage ___________________________
_______________________________________
_____________________________________ [2]
9
(b) Describethetransferofafileofdatafromprimarymemorytoastoragedevice.
Thequalityofwrittencommunicationwillbeassessedinyouranswertothisquestion.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [8]
10
3 Afirmofsolicitorshasbeenusingacomputersystemwhichkeepsrecordsofitsclientsandotherinformationnecessaryfortherunningofthebusiness.
Ithasbeendecidedtoreplacethesystemwithamoreup-to-dateone.
Asystemsanalysthasbeenappointedtosupervisethereplacement.
(a) Thesystemsanalystwillneedtocarryoutafeasibilitystudy.
DescribethefunctionANDpurposeofafeasibilitystudy.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [5]
11
(b) Theanalystproducesuserandtechnicaldocumentationforthenewsystem.
(i) StateTHREEitemswhichwouldbecontainedintheuserdocumentation.
1 ______________________________________
_______________________________________
2 ______________________________________
_______________________________________
3 ______________________________________
_____________________________________ [3]
(ii) DescribeTWOkindsofdiagramwhichmaybeinthetechnicaldocumentation.
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [4]
12
(c) Theclientfilerequirespicturestobestoredtoidentifytheclients.
DescribeTWOmethodsofcapturingthepicturesforthesystem.
Method 1 __________________________________
__________________________________________
__________________________________________
__________________________________________
Method 2 __________________________________
__________________________________________
__________________________________________
________________________________________ [4]
13
(d) Explaintheneedforlegislationtogoverntheuseofcomputersforstoringpersonaldata.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [4]
14
4 (a) Describewhateachofthefollowingpartsofacomputerdoes.
(i) Controlunit
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [3]
(ii) Memoryunit
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [3]
15
(iii) ALU
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [3]
(b) Whendataisbeingtransmittedaroundacomputer,busesareused.
NameanddescribethefunctionsofTWO different typesofbus.
Type1 ____________________________________
__________________________________________
__________________________________________
__________________________________________
Type2 ____________________________________
__________________________________________
__________________________________________
________________________________________ [4]
16
5 Alibrarydirectsallmemberstoanareawheretheycanhavetheirloansinputintothecomputersystem.
The membership number is read from the member’s card.
(a) DescribeTWOwaysthatthemembershipnumbercanbeinputtothecomputersystem.
1 _________________________________________
__________________________________________
__________________________________________
__________________________________________
2 _________________________________________
__________________________________________
__________________________________________
________________________________________ [4]
17
(b) DescribeTWOformsofoutputwhichcouldbeproducedbythesystemfollowingtheinputofthemembership number.
1 _________________________________________
__________________________________________
__________________________________________
__________________________________________
2 _________________________________________
__________________________________________
__________________________________________
________________________________________ [4]
18
(c) Untilrecentlytheloanssystemhadbeenamanualone.
Explainthechangestothestaff’sworkexpectationsfollowingtheintroductionofthecomputerisedsystem.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [5]
19
BLANK PAGE
20
6 Anauthorworksfromhomeusingacomputersystem.
Sheusesanumberofpiecesofutilitysoftware. Statethepurposeofeachofthesetypesofutilityand
describehowtheauthorwouldusetheminherwork.
(i) Compressionsoftware
Purpose ___________________________________
__________________________________________
Use ______________________________________
__________________________________________
__________________________________________
________________________________________ [3]
(ii) Filehandlers
Purpose ___________________________________
__________________________________________
Use ______________________________________
__________________________________________
__________________________________________
________________________________________ [3]
21
(iii) Hardwaredrivers
Purpose ___________________________________
__________________________________________
Use ______________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [3]
(iv) Backuputility
Purpose ___________________________________
__________________________________________
Use ______________________________________
__________________________________________
__________________________________________
________________________________________ [3]
22
7 (a) (i) Describewhatismeantbythebitrateofdatatransmission.
_______________________________________
_______________________________________
_______________________________________
_____________________________________ [2]
(ii) Stateatypeofdatatransmissionwhichwouldrequireahighbitrate,givingreasonsforyourchoice.
Data transmission _______________________
_______________________________________
Reasons _______________________________
_______________________________________
_______________________________________
_____________________________________ [3]
23
(b) Explainwhyahandshakesignalisnecessary.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [3]
24
8 (i) Expressthedenarynumber107asan8bitbinarynumber.
__________________________________________
__________________________________________
__________________________________________
________________________________________ [2]
(ii) Expressthedenarynumber107asahexadecimalnumber.
__________________________________________
__________________________________________
__________________________________________
________________________________________ [2]
(iii) Useyourpreviousanswerstoshowtherelationshipbetweenbinaryandhexadecimalnotations.
__________________________________________
__________________________________________
__________________________________________
__________________________________________
__________________________________________
________________________________________ [3]
