Object Oriented Analysis, Design and Programming

Transcription

1 Object OrientedAnalysis,DesignandProgramming Medialogy,Semester4 Monday8June Youhave3hourstocompletethisexamination.Neitherwrittenmaterialnor electronicequipmentmaybebroughtintotheexaminationroom.the maximumtimethatyouareadvisedtospendoneachquestionisgiven.later questionsarelonger.answersmustbeinenglishordanish. Question1.(3minutes) Inordertobeconsidered highquality,asoftwaresystemmustbe Whichoneofthefollowingisthebestcompletionoftheprevioussentence? A. useful,powerfulandreliable. B. fast,affordableandusable. C. reliable,flexibleandaffordable. D. available,flexibleandefficient. Question2.(3minutes) WhichofthefollowingwasnotafactorinthefailureofTaurus? A. Theytriedtodotoomuchinonego. B. Decisionsweremadebyasmallcommitteeofpowerfulindividuals withoutconsultingallthestake holders. C. Theychosetouseanexpensivenewsysteminsteadofmodifyingan existingone. D. Workwascarriedoutbytwocompetingconsultancyfirms. Question3.(3minutes) Whichofthefollowingstatementsarefalse? A. AmoduleAisdependentonanothermoduleBifachangeinAmight necessitateachangeinb. B. AmoduleAisdependentonanothermoduleBifachangeinBmight necessitateachangeina. C. IfAdependsonB,thenAisaclientofB. D. IfAdependsonB,thenAprovidesservicestoB. continued 1

2 OOADP2009Exam MedialogySemester4 AalborgUniversity Question4.(3minutes) RepresentthefollowingJavacodeinUML. public enum Priority { HIGH, MEDIUM, LOW, Question5.(3minutes) Correctthefollowingprogramsothatitprintsout Helloworld!. public class HelloWorld { public void main(string args) { System.out.println("Hello world!); Question6.(3minutes) Writedowntheoutputofthefollowingprogram: public class Question6 { int d = -5; System.out.println("a" + d + d); System.out.println(d + d + "a"); Question7.(3minutes) Correctthefollowingcodefragmentsothatitprintsoutthecontentsofthe array,a,inreverseorder. int[] a = {1,2,3,4; for (int i = a.length; i >= 0; i--) System.out.println(a[i]); Question8.(3minutes) Completethefollowingtwosentences: A. The ofamodellinglanguageisthesetofrulesdescribinghow modelelementscanbeputtogethertomakelegalmodels. B. The ofamodellinglanguageisthesetofrulesgoverninghowa legaldiagramshouldbeinterpreted. continued 2

3 OOADP2009Exam MedialogySemester4 AalborgUniversity Question9.(3minutes) Name,inthecorrectorder,the5mainphasesofthewaterfallprocess. Question10.(3minutes) Whichofthefollowingstatementsistrue? A. Aclassdiagramisabehaviourdiagram. B. Astate machinediagramisabehaviourdiagram. C. Anactivitydiagramisastructurediagram. D. Ause casediagramisastructurediagram. Question11.(3minutes) Studythefollowingcode. public class Question13 { int x; public Question13(int x) { XXXXXXX WritedownthecodethatshouldreplaceXXXXXXXifwewantthiscodetosetthe valueoftheinstancevariablecalledxtothevalueoftheconstructorargument calledx. Question12.(4minutes) Studythefollowingdiagramandanswerthequestionsthatfollowit. a. Whatkindofdiagramisthis? b. WhatkindofthingisA? c. WhatkindofthingisB? d. WhatdoesCrepresent? continued 3

4 OOADP2009Exam MedialogySemester4 AalborgUniversity Question13.(4minutes) Studythefollowingdiagramandanswerthequestionsbelowit. a. Whatkindofdiagramisthis? b. DoesthediagramtellusthateachobjectofclassAisafloobleofanobject ofclassb? c. HowmanyobjectsofclassAareassociatedwitheachobjectofclassB? d. ListtheoperationsofclassB. Question14.(4minutes) Studythefollowingdiagramandanswerthequestionsbelowit. a. IsAageneralizationoraspecializationofB? b. WhichoperationsinBareoverriddeninA? c. WhichoperationsinBareoverloadedinA? d. Asfaraswecantellfromthediagram,whatinstancevariablesdoesan objectofclassacontain? Question15.(4minutes) Whatistheoutputofthefollowingprogram? public class Question16 { public static int i = 0; public Question16() {i++; for (int j = 3; j >= 0; j--) { new Question16(); System.out.println(i); continued 4

5 OOADP2009Exam MedialogySemester4 AalborgUniversity Question16.(4minutes) Studythefollowingcode. interface A { //The following method should always return 0. int a(); public class Question17 implements A { ZZZZZZZ new Question17(); WritedownthecodethatisneededtoreplaceZZZZZZZinordertomakethis programcompile. Question17.(4minutes) Studythefollowingdiagramandanswerthequestionsthatfollowit. a. Whatkindofdiagramisthis? b. Whatdoesarrowdrepresent? c. WhatarebothAandB? d. Whatise? continued 5

6 OOADP2009Exam MedialogySemester4 AalborgUniversity Question18.(4minutes) Studythefollowingdiagram. a. Whatkindofdiagramisthis? b. Giveanexampleofaneventinthisdiagram. c. Giveanexampleofanactioninthisdiagram. d. Giveanexampleofastateinthisdiagram. Question19.(6minutes) ThefollowingcodeisthecontentsofafilecalledQuestion12.java.Itwillnot compile.somethinghastobeinsertedinordertomakeitcompile.writedown thecodethathastobeinsertedandstatewhereithastobeinserted.the numberatthebeginningofeachlineindicatesthelinenumberandisnotpartof thecode. 1 package dk.aau.imi.med4.ooadp2009.exam; 2 3 class Point { 4 public int x, y; 5 public Point(int x, int y) { 6 this.x = x; 7 this.y = y; public class Question12 { Point p = new Point(); 14 System.out.println(p.x); continued 6

7 OOADP2009Exam MedialogySemester4 AalborgUniversity Question20.(6minutes) Whatistheoutputofthefollowingprogram? public class Question20 { static class WibbleException extends Exception { private static final long serialversionuid = 1L; public WibbleException() {super(); public WibbleException(String s) {super(s); static void splurge(int i) throws WibbleException { throw new WibbleException("Oops! ("+i+")"); try { splurge(5); catch (WibbleException e) { System.out.println("Wibble exception: " +e.getmessage()); Question21.(6minutes) ThefollowingJavacodefragmentshoulduseinsertionsorttosortthedouble valuesinthearray,ar,intonon decreasingorder.writedownthethreetokens thatareneededtoreplacexxx,yyyandzzz. for(int j = 1; j < ar.length; j++) { double k = ar[j]; int i = j - 1; while (i XXX 0 && ar[i] YYY k) { ar[i+1] = ar[i]; ZZZ; ar[i+1] = k; Question22.(10minutes) AccordingtoGradyBooch,an objectisa thathas, and. Fillintheblanksandbrieflyexplainthemeaningofeachofthefourterms. continued 7

8 OOADP2009Exam MedialogySemester4 AalborgUniversity Question23.(15minutes) StudythefollowingthreeclassdefinitionsanddrawaUMLclassdiagramthat describesthemandtherelationshipsbetweenthem.putasmuchdetailinyour diagramasyoucan,butdonotprovidetheimplementationsoftheclass operationsinyourdiagram.assumethatthethreeclassesaredefinedin separatefilesinthesamepackage. public class X { private Y a; public Y geta() {return a; public void seta(y x) {a = x; public class Y { private int a,b; public int geta() {return a; public void seta(int x) {a = x; public int getb() {return b; public void setb(int x) {b = x; public class Z extends Y { private int c; public int getc() {return c; public void setc(int x) {c = x; Question24.(15minutes) a. Whatisthemaindisadvantageofthewaterfallprocess? b. Drawasimplediagramthatsummarisesthemainideasbehindthespiral developmentprocess. c. Wearedoingoneanalysisiterationfollowedbytwodesigniterations. Explainwhythisstatementimpliesthatthespeakerisnotusingan iterativeprocess. Question25.(20minutes) Writeashortaccountofasoftwaredisaster.Brieflydescribethebackgroundand thenatureofthefailure,theconsequences,thepossiblecausesandwaysin whichitmighthavebeenavoided.writenomorethan300words(inenglishor Danish). continued 8

9 OOADP2009Exam MedialogySemester4 AalborgUniversity Question26.(20minutes) Studythefollowingprogram. public class Question25 { Circle c = new Circle(); System.out.println(c); Circle d = new Circle(2,3,4); System.out.println(d); Circle e = new Circle(2,3,3); Circle f = new Circle(2,4,4); Circle g = new Circle(3,3,4); Circle h = new Circle(2,3,4); System.out.println(d.compareTo(e)); System.out.println(d.compareTo(f)); System.out.println(d.compareTo(g)); System.out.println(d.compareTo(h)); NowwriteaCircleclasssothatwhentheaboveprogramisrun,itproducesthe followingoutput: Centre is (1.0,2.0), diameter is 3.0 Centre is (2.0,3.0), diameter is ENDOFEXAM 9