星期三上午computer science paper 2 sl计算机科学.pdf

M13/5/COMSC/SP2/ENG/TZ0/XX

COMPUTERSCIENCE

STANDARDLEVEL

PAPER2

Wednesday15May2013(morning)

1hour30minutes

INSTRUCTIONSTOCANDIDATES

• Donotopenthiaminationpaperuntilinstructedtodoso.

• Answerallthequestions.

• AcleancopyoftheComputerSciencecasestudyisrequiredforthispaper.

• Theummarkforthiaminationpaperis[70marks].

2213-70144pages

©InternationalBaccalaureateOrganization2013

–2–M13/5/COMSC/SP2/ENG/TZ0/XX

Answerallthequestions.

1. Datatypesanddatastructuresareanimportantfeatureofeveryprogramminglanguage.

(a) Statetwopossibleconsequencesofselectingthewrongdatatypeforthedata

thatyouintendtostore.[2marks]

(b) Outlineasetofdatathatcouldbestoredinaone-dimensionalarrayofBoolean.[2marks]

(c) ConstructthemethodhowMany()thatwillinspectyourBooleanarrayin

part(b)anddisplaythenumberofoccurrencesofeachofthedifferentvalues

storedinit. Youcanassumethatthesizeofthearrayis100,andthatyour

datastructureisdeclaredglobally.[5marks]

Thetablebelowshowsthewagespaidtofveemployeesforeachmonthoftheyear

(ineuros).

JanFebMarAprMayJuneJulAugSepOctNovDec

Adams245625462967305723472107234630493246354659403747

Parr546335467564354738563546453635462435347546573564

Rooney463546574697483943643465553635462375354635462435

Song634676864657967536456354976524353542635436473748

Suarez253325362175186923981384134628132738273812962375