ssd4所有quiz选择题答案.docx

ssd4所有quiz选择题答案.docx

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ssd4所有quiz选择题答案

SSD4

Quiz1

1.Howmanychunksofinformationcanworkingmemoryholdatonetime?

（a）Nine

（b）One

（c）Five

（d）Three

Correctansweris（d）

Seesection1.1.3ofthecoursenotes.

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2.WhichofthefollowingisadescriptionofFitts'sLaw?

（a）Thetimeittakestopointtoatargetisaconstant:

ittakesthesameamountoftimetopointtoonetargetasitdoestoanyothertarget.

（b）Thetimeittakestopointtoatargetisdirectlyrelatedtothedistancetothattarget.

（c）Theactionofclickingabuttontakes200msec.

（d）Whencalculatingthetimeittakestopointtoatarget,thesizeofthetargetisnotimportant.

Correctansweris（b）

Seesection1.1.3ofthecoursenotes.

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3.Whichofthefollowingisanimplicationthatthecharacteristicsofthehumanfoveahaveforthedesignofvisualinterfaces?

（a）Itisimportanttodesignaroundtheeye'sblindspot,whichmakesitdifficulttoseepartsofthescreen.

（b）Becarefulwhenusingblinkingtextoranimationsbecausetheynaturallydrawtheuser'sattention.

（c）Becausethefoveaencompassesonly2degreesofvisualangle,alltextshouldbeconcentratedinasmallareaofthescreen.

（d）Therearenodesignimplications.

Correctansweris（b）

Seesection1.1.3ofthecoursenotes.

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4.Accordingtotheinformationprocessingmodelofhumancognitiveactivity,whichofthefollowinghappenstoinformationfromtheoutsideworldimmediatelyafteritisperceivedbytheperceptualprocessor?

（a）Thecognitiveprocessordeterminesthatanactionneedstobetaken.

（b）Themotorprocessorcompletesanactionbasedontheinformation.

（c）Itisdepositedintoworkingmemory.

（d）Itisdepositedintolong-termmemory.

Correctansweris（c）

Seesection1.1.3ofthecoursenotes.

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5.Feedbackfromusersofthesoftwaresystemswebuildisuseful,andevennecessary.Thisisbecausesuchfeedback

（a）pleasesusersbyshowingthatweareinterestedintheiropinion.

（b）helpsusselectthebestofourusers.

（c）helpsusassignblameamongtheprogrammersinourteam.

（d）istheonlywaytodiscoverunforeseenshortcomingsofoursoftware.

Correctansweris（d）

Seesection1.1.1ofthecoursenotes.

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6.Softwarecompaniesoftenreleaseso-called"beta"versionsofsoftware.Abetaversionofaprogramisusuallygivenawaytoaselectedgroupofuserswhoagreetotestandcommentontheprogrambeforeitisreleasedtothewidermarket.Acompanythatreleasesbetaversionsisthusengagingin

（a）iterativedesign.

（b）leverageofaffordance.

（c）word-of-mouthadvertising.

（d）aggressivemarketing.

Correctansweris（a）

Seesection1.1.1ofthecoursenotes.

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7.Theevent-redrawloopis

（a）anaffordancecommonlyfoundindrawingprograms.

（b）aprogrammingconstructusedinredrawingeventobjectsonthescreen（e.g.,ameetinginaschedulingprogram）.

（c）abuilt-inJavamethodinvokedwhenyouthrowanexceptionforavisibleicon.

（d）themainprogrammingconstructofinteractiveprograms.

Correctansweris（d）

Aninteractiveprogramlistensforeventsandreactstothem.Thereactionusuallyinvolvessomeredrawingofthescreen.Becausearesponsiveprogramneedstolistenforeventsconstantly,evenwhileitdoesotherthings,thisevent-redrawloophastobethemainconstructoftheprogramintowhichallotherfunctionsareincorporated.Seesection1.1.2ofthecoursenotes.

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8.When,onyourcomputerscreen,youdragtheimageofafoldertoadifferentwindow,youare

I.directlymanipulatingthebitsofthediskfile.

II.manipulatinganimagethatrepresentsthebitsofthediskfile.

III.generatingmouseeventsthatcausethewindowsinterfaceprogramtoredrawtheimageofthefoldercontinuously,indifferentlocations,asitappearstomove.

（a）IIIonly.

（b）IIandIIIonly.

（c）IIonly.

（d）Ionly.

Correctansweris（b）

Seesection1.1.2ofthecoursenotes.

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9.Yoursupervisorhasrequestedthatyouuseatoolkittobuildafancynewuserinterface,andshehasgivenyouthefollowingreasonstodoso（besidesenticingyouwithapromiseofapayraise）:

I.Toolkitshavewidgetsthatallowyoutogenerateprototypesrapi