2015 hsc information processes and technology

2460

2015 HIGHER SCHOOL CERTIFICATE EXAMINATION

Information Processes and Technology

General Instructions

•Readingtime–5minutes

•Workingtime–3hours

•Writeusingblackpen

•Drawdiagramsusingpencil

Total marks – 100

Section I Pages 2–8

20 marks

•AttemptQuestions1–20

•Allowabout40minutesforthissection

Section II Pages9–12

40 marks

•AttemptQuestions21–24

•Allowabout1hourand10minutesforthissection

Section III Pages13–16

40 marks

•AttemptTWOquestionsfromQuestions25–28

•Allowabout1hourand10minutesforthissection

– 2 –

Section I

20 marksAttempt Questions 1–20Allow about 40 minutes for this section

Usethemultiple-choiceanswersheetforQuestions1–20.

1 Atwhichofthefollowingstagesofsystemdevelopmentisarequirementsprototypeusedtomodelfeaturesofaproposedsystem?

(A) Designingasolution

(B) Understandingtheproblem

(C) Implementingandtestingasolution

(D) Evaluatingandmaintainingthesystem

2 SamhasaccesstoLee’sprivatecontactdetailsviasocialmedia.

SamsharedLee’sdetailswithacousinwhodoesnothaveaccesstoLee’ssocialmediasite.

HowisSam’sactionbestdescribed?

(A) Unethicaluseofinformation

(B) Infringementofcopyrightlaws

(C) Appropriateinformationuse

(D) Breachofgovernmentlegislation

3 Whichofthefollowingsetsoftasksisusuallyperformedbyanetworkadministrator?

(A) Addingusersandcreatingwebpages

(B) Addingusersandassigninguserstoprinters

(C) Updatingadatadictionaryandcreatingwebpages

(D) Updatingadatadictionaryandassigninguserstoprinters

–3–

4 ConsiderthispieceofHTMLcode.

<a href=“optic_fibre.html”> <img src=“optic_fibre.jpg”></a>

WhichofthefollowingbestdescribeswhattheHTMLcodedoes?

(A) Itrunsavideo.

(B) Itinsertsanimage.

(C) Itcreatesavideothatishyperlinked.

(D) Ithyperlinksanimagetoawebpage.

5 Kate isproducingagraduationvideotobeuploadedto theschoolwebsite.Thevideoneedstobereadyinonemonthandsheisnotsureifshehasthesoftwareonherlaptoptoproducethevideo.

WhichcombinationoffeasibilityconcernsappliestoKate’ssituation?

(A) Schedulingandtechnical

(B) Schedulingandeconomic

(C) Organisationalandtechnical

(D) Organisationalandeconomic

6 Thenetworkadministratorhasemailedthisalerttostaff.

Movil AcademyUser ID:

Password:

Subject: URGENT NOTICETo: Movile-staff

If you see this screen, do NOT provide your login details.

Warm regards,Network Administrator

Whatissueisbeingaddressedbythenetworkadministrator?

(A) Security

(B) Encryption

(C) Datacollection

(D) Dataredundancy

– 4 –

7 Whichhardwarecomponentisnecessarytophysicallyconnectaclienttoaserver?

(A) Modem

(B) Repeater

(C) WirelessAccessPoint

(D) Networkinterfacecard

8 Aprojectteamhasconductedareviewforupgradingalibrarysystem.

Whichdocumentshouldtheprojectteamproducetodetailthepurposeoftheupgrade,theanalysisoftheexistingsystemandthetimeframeoftheproject?

(A) AGanttchart

(B) Arequirementsreport

(C) Afeasibilitystudyreport

(D) Acommunicationmanagementplan

9 Apersonclicksonamovienametoshowthesessiontimesonacinemawebsite.

Whichcombinationofinformationprocessesisbeingcarriedout?

(A) Analysing,storing,receiving

(B) Collecting,storing,displaying

(C) Analysing,organising,receiving

(D) Collecting,organising,displaying

10 Aprojectteamhasjustcompletedtheinstallationofthehardwareandsoftwareforanewsystem.

Whichofthefollowingismostlikelytobethenextstep?

(A) Clarifythepurposeofthenewsystem

(B) Produceaworkingmodelofthenewsystem

(C) Developanoperationmanualforparticipants

(D) Investigatealternativesolutionsforparticipants

–5–

11 Whatisthemainfunctionofaswitchinacommunicationsystem?

(A) Itlinkstwoidenticalnetworks.

(B) Itlinkstwodifferenttypesofnetworks.

(C) Itconnectsanetworkdevicetotheinternet.

(D) Itenablesnetworkdevicestotalktoeachother.

12 Acompanyhasdecidedtoreplaceitscurrenttwistedpaircablingwithopticalfibre.

Whichofthefollowingcouldbeareasonforthisdecision?

(A) Bettererrorcorrection

(B) Largerstoragecapacity

(C) Fasterdatatransmission

(D) Morereliablewirelessconnectivity

13 Severalemployeeswereaskedtoobtainfeedbackfromcustomersonanewproduct.Toachievethis,theycreatedanonlinesurveyformtocapturedata.

Whichdevelopmentapproachwasused?

(A) Customisation

(B) Participant

(C) Outsourcing

(D) Traditional

14 Whichof thefollowingactionsismost likelyto improvethereliabilityofemployees’detailsstoredinacompany’sdatabase?

(A) Storethedatabaseoff-site

(B) Runaviruscheckeachday

(C) Reviewpersonaldetailseachyear

(D) Performafullbackupeachweek

– 6 –

15 WhatistheprotocolSSLcommonlyusedfor?

(A) Toestablishaconnectionbetweentwocomputersonanetwork

(B) Toreceiveandsendfilesbetweencomputersonanetwork

(C) Toestablishanencryptedlinkbetweenawebserverandabrowser

(D) Toreceiveandsendemailmessagesbetweenabrowserandaserver

16 Which row of the following table correctly describes centralised and distributeddatabases?

Centralised databases Distributed databases

(A) Onlysuitableforflatfiledatabases Noneedtosynchronisedatastored

(B) OnlysuitableforflatfiledatabasesAllowsdifferentlocationsfasteraccesstorelevantdata

(C)Allowsdifferentlocationstoaccessdatafromasinglesource

Noneedtosynchronisedatastored

(D)Allowsdifferentlocationstoaccessdatafromasinglesource

Allowsdifferentlocationsfasteraccesstorelevantdata

17 Whichofthefollowingisatransmissionlevelprotocol?

(A) SMTP

(B) Ethernet

(C) InternetProtocol

(D) HyperTextTransferProtocol

– 7 –

18 Asportingclubmanagerwantstosearchtheclub’sdatabaseformemberswhoareunder16aswellasmemberswhoplaysoccer.

WhichofthefollowingisthecorrectSQLcriteriatoobtainthisinformation?

(A) Age<16ORsport=‘soccer’

(B) Age<16ANDsport=‘soccer’

(C) Age>16ORsport=‘soccer’

(D) Age>16ANDsport=‘soccer’

19 Adatabaseisbeingdesignedforanonlinepharmacy.AcustomercanordermorethanonedrugandarecordisplacedintheTransactionstableforeachdrugordered.

Thediagrambelowdescribessomecomponentsalreadyidentifiedforthedatabase.

Customers

Customer_ID (P)

Surname

Given_Name

Transactions

Transaction_ID

Customer_ID

Drug_ID

Date

Drugs

Drug_ID (P)

Drug_Name

Cost

Key(P) = Primary key

WhataretherelationshipsbetweentheCustomersandTransactions tablesandbetweentheTransactionsandDrugs tables?

Customers – Transactions Transactions – Drugs

(A) manytoone manytoone

(B) manytoone onetomany

(C) onetomany manytoone

(D) onetomany onetomany

– 8 –

20 Thetablebelowshowstheresultsofthetransmissionofthreedatabytes.

First byte Second byte Third byte

01100111 10011001 11000101

Twoofthedatabyteswerecorruptedduringtransmission.

Which parity was used, and which two of the data bytes were corrupted duringtransmission?

Parity Corrupted data bytes

(A) Odd Firstandsecond

(B) Odd Secondandthird

(C) Even Firstandsecond

(D) Even Secondandthird

– 9 –

Section II

40 marksAttempt Questions 21–24Allow about 1 hour and 10 minutes for this section

Answereachquestionintheappropriatewritingbooklet.Extrawritingbookletsareavailable.

Ifyouincludediagramsinyouranswer,ensurethattheyareclearlylabelled.

Question 21 (10marks)UsetheQuestion21writingbooklet.

A school library has set up a video-on-demand information system. Teachers andstudentscanaccessthesystemusingavalidemailaddressandpassword.

Atschool,videosareaccessedvia theschool’sserverusing the localareanetwork(LAN).Athome,videosare suppliedbyanonlineprovidervia the internetoverawideareanetwork(WAN).

(a) Drawacontextdiagramrepresentingthevideo-on-demandinformationsystem. 3

(b) Recommend a suitable network topology for the LAN in this informationsystemandjustifyyourchoice.

3

(c) Explain theadvantagesofusingaLANcompared tousingaWANtoaccessvideosinthisinformationsystem.

4

–10–


Asportingclub isplanning toautomate theentryprocess to itsvariousvenues.Atpresent,whenamemberentersavenue,astaffmemberenterstheirmembershipcardnumberintoacomputersystemtoseeifthememberhasanexpiredmembershipcardorifthememberhasbeenbannedfromtheclub.Noentrywillbeallowedusinganexpiredorbannedmembershipcard.

Intheproposedsystem,anentrymachinewillbeinstalledineachofthevenuesoftheclubandmemberswillonlyhavetoinserttheirmembershipcardsintothemachinestoenter.Themachineswillautomaticallychecktheexpirydateofeachmembershipcardandwhetherthememberhasbeenmarkedas‘banned’inthedatabase.Ifentryisrefused,anexplanationwillbeprintedforthemember.

(a) Constructadecisiontabletodescribetherulesusedtodetermineifamemberisallowedtoentertheclub.

3

(b) DrawadataflowdiagramtorepresenttheproposedentrysystemforONEoftheclub’svenues.

4

(c) Recommend a combination of conversion methods for the implementationof theproposedsystemintoallof thesportingclub’svenuesandjustifyyourchoice.

4

–11–


A bank has introduced an information system that allows customers to withdrawmoneybymakingarequestontheirmobilephone.Usingthissystem,thecustomerwillbesentatemporarywithdrawalcodeinatextmessageaftermakingawithdrawalrequest.Thewithdrawalcodecan thenbeenteredat anATMfor themoney tobereleased.

Alternatively, the customer can provide the bank with the mobile phone numberof an authorisedperson and thebankwill send a textmessagewith the temporarywithdrawal code to this person. This system can be useful in situations where acustomerhaslosttheircardormaywanttosendmoneytotheirchildrenorrelatives.

(a) Using an example, distinguish between a user and a participant in thisinformationsystem.

3

(b) Analysetheinformationsystemintermsoftheinformationprocessesof:

• storingandretrieving

• transmittingandreceiving.

5

–12–


Anonlinedepartmentstorehasintroducedaloyaltysystemthatoffersitscustomersgiftswhentheyhaveaccumulatedanumberofpoints.

Whenacustomerappliesforaloyaltycard,theyenterpersonaldetailssuchasname,address,ageandincomelevelonline.Thesedetailsarekeptbythedepartmentstore.

Whenever a customer presents their card during a purchase, details such as brandnames,quantities,discountreceived,amountspent,anddateandtimeofpurchasearecollectedandstored.

Data mining is performed on the stored data. The store uses this information todeterminepurchasingandpromotionalstrategies.Italsosharesthisinformationwithitsbusinesspartnerssothattheycansenddirectadvertisingemailstothecustomers.

(a) Outlinehowcyclic redundancycheck (CRC)canbeused in this informationsystem.

2

(b) Discusstheuseofdatamininginthisinformationsystem. 4

(c) Describehowinternet,intranetandextranettechnologieswouldbeusedinthisinformationsystem.

5

–13–

Section III

40 marksAttempt TWO questions from Questions 25–28Allow about 1 hour and 10 minutes for this section

AnswereachquestioninaSEPARATEwritingbooklet.Extrawritingbookletsareavailable.

Ifyouincludediagramsinyouranswer,ensurethattheyareclearlylabelled.

Question 25 — Transaction Processing Systems (20marks) UseaSEPARATEwritingbooklet.

(a) Whatisatransactionprocessingsystem? 2

(b) Whyarebothoff-sitestorageandon-sitestoragenecessarywhenbackingupatransactionprocessingsystem?

3

(c) Describe how online transaction processing (OLTP) has contributed to thedevelopmentoftransactionprocessingsystems.

3

(d) Explainhowdataintegrityanddataqualitycanbemaintainedinatransactionprocessingsystem.

4

(e) Anewtransportsystemhasbeenproposedtoconsolidate themanagementofbuses,trainsandferries.

Theproposedsystemwillhaveacentralisedpaymentsystem.Eachcustomerwillhaveasmarttaglinkedtoasmarttagaccountwhichischargedeachtimeacustomerusesthetagtogetoffabus,atrainoraferry.Thesmarttagaccountisalsolinkedtothecustomer’sbankaccountsothatthebalanceofthesmarttagaccountcanbeautomaticallyupdatedwhenitfallsbelowacertainvalue.

Customerscanviewdetailsoftheirtransactionsonthewebsiteofthepaymentsystem.Statementsdetailingthecost,time,startinglocationanddestinationwillalsobeemailedtocustomerseverymonth.

(i) Outlinereal-timeandbatchprocessingthatwouldoccurinthecentralisedpaymentsystem.

3

(ii) Discuss issues that could arise from implementing the centralisedpaymentsystem.

5

–14–

Question 26 — Decision Support Systems (20marks) UseaSEPARATEwritingbooklet.

(a) Whatisadecisionsupportsystem? 2

(b) Howaregeographicinformationsystemsusedtosupportdecisionmakinginadecisionsupportsystem?

3

(c) Describe how spreadsheets can assist with the analysis of data in a decisionsupportsystem.

3

(d) Using examples, distinguish between forward and backward chaining in anexpertsystem.

4


The proposed system will have a centralised traffic management system thatwilluseneuralnetwork technology toanalyse trafficdata inorder toprovidesmootherjourneysforcustomerswhohavetochangebusesortrains,orconnectfromonemodeoftransporttoanother.Forexample,ifbusesarerunninglate,some train timetablesmaybeadjusted toallow for theconnection.Alertsondelays,trafficcongestionanddetours,andsuggestionsofalternativerouteswillalsobegeneratedforcustomerstoaccessusingmobiledevices.

(i) Outlinethebenefitsofusingneuralnetworktechnologyinthecentralisedtrafficmanagementsystem.

3

(ii) Explainproblemsthatcouldarisefromusingneuralnetworktechnologytoimplementthecentralisedtrafficmanagementsystem.

5

–15–

Question 27 — Automated Manufacturing Systems (20marks) UseaSEPARATEwritingbooklet.

(a) Whatisanautomatedmanufacturingsystem? 2

(b) Howcanbarcodereadersbeusedinanautomatedmanufacturingsystem? 3

(c) Describehowamachine-centredsystemworksinanautomatedwarehouse. 3

(d) Using examples, distinguish between underdamping and overdamping in anautomatedmanufacturingsystem.

4


The proposed system will have a centralised control system that will usecontrollers,sensorsandactuatorstoregulatetheflowoftrafficacrosstheentiretransport system. Manually controlled gates and timed signal lights will bereplaced.Forexample,sensorswillbeactivatedwhenacarapproachesasetoftrafficlights,andthecontrollerwilldirectthelightstoallowthecartopassifthereisnoothertraffic,orstopthecarifthereistraffic.

(i) Outline the types of sensors and actuators that could be used in thecentralisedcontrolsystem.

3

(ii) Explain the potential benefits of implementing the centralised controlsystem.

5

Please turn over

–16–

Question 28 — Multimedia Systems (20marks) UseaSEPARATEwritingbooklet.

(a) Whatisamultimediasystem? 2

(b) Whataretheadvantagesofproducinganonlineversionofamagazinecomparedtoitsprintversion?

3

(c) Distinguishbetweenhierarchicalandnon-linearstoryboard layouts.Youmaysupportyouranswerwithdiagram(s).

3

(d) Describe how head-up displays and headsets are used in virtual realityapplications.

4


The proposed system will have a centralised multimedia information systemthatwillprovidecustomerswithaccesstomaps,transporttimetablesandlivevisualandaudioalertsabouttrafficandroadconditions.Customerscanaccessthisinformationusingmobiledevices.

(i) Outlinetheskillsrequiredofcontentprovidersandsystemdesignersinthedesignofthecentralisedmultimediainformationsystem.

3

(ii) Discuss technical issues that could arise from implementing thecentralisedmultimediainformationsystem.

5

End of paper

©2015BoardofStudies,TeachingandEducationalStandardsNSW

2015 hsc information processes and technology

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