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NAMIBIA UNIVERSITYOF SCIENCE AND TECHNOLOGY

FACULTY OF COMPUTING AND INFORMATICSDEPARTMENT OF COMPUTER SCIENCE

QUALIFICATION: BACHELOR OF COMPUTER SCIENCE, BACHELOR OF INFORMATICS

QUALIFICATION CODE: 07BACS,07BAIF LEVEL: 7

COURSE: SOFTWARE ENGINEERING 2 COURSE CODE: SEN721S

DATE: NOVEMBER2018 PAPER: THEORY

DURATION: 3 HRS MARKS: 100

FIRST OPPORTUNITY EXAMINATION

EXAMINER(S) Mr. JEREMIAH LUMBASI

MODERATOR: Dr. KAUNA MUFETI (University of Namibia)

THIS PAPER CONSISTS OF 3 PRINTED PAGES

(Including this front page)

THIS QUESTION PAPER CONSISTS OF 2 PRINTED PAGES

(Excluding this front page)

INSTRUCTIONS

1. AnswerALL the questions in the provided Examination answer booklet

2. Write clearly & neatly and numberthe answersclearly.

3. Whenanswering questions you should be guided by the allocation of marks

in square brackets[].

4. Use of any electronic devices (e.g. cell-phones) is prohibited

5. NUST examination rules and regulations apply.

PERMISSIBLE MATERIALS

1. Non programmableScientific Calculator.

Question 1[14 marks]

1.1 Whatis object orientation? And howdoesit differ from the traditional procedural approach?

[4 marks]

12 One ofthe difficulties and risks in software engineering as a whole is complexity,

explain two ways in whichthis occurs and a resolution to this approach.

(8 marks]

L3 Explain the Liskov substitution principle. [2 marks]

Question 2[ 22 marks]

2.1 Whatdoes it mean by software engineers should aim make their designs reusable

[2marks]

Ded Explain different types of re-use practiced by software engineers. [10 marks]

2.3 Define the term framework. What are hooksandslots on a frameworkexplain with a

suitable example. [6 marks]

2.4 Imagine you are designing a frameworkthat different libraries (of books, not code)

would beable to adapt to meet their needs. What kind offacilities would you want to

provide if you were designing such a framework? In what waysdolibraries differ such

that they would needto use a frameworkrather than a complete application?

[6 marks]

Question 3[16 marks]

3.1. Explain with examples and reference to UML thefollowing modelling approaches

[6 marks]

e Use case modeling

e Structural modelling

e Behavioral modeling

3.2. The Fantasy Football League are rebuilding their fantasy football software, and you

are tasked with its design. A football game has up to 50 people involved, who each

have a name, and a number. These people may be: players, who also record the

number of goals scored; umpires, who record the number of whistles blown; and

coaches, who record the numberofinjuries. Some players are also captains, and

record the numberof players on their team. Draw a class diagram clearly showing

generalization [10 marks]

Question 4 [19 marks]

4.1 Whatsolution did Component-Based Software Engineering(CBSE) provide that Object

Oriented developmentdid notoffer. [3marks]

4.2 Give a brief explanation to the following component characteristics: (a)Standardized,

(b)Independent, (c)Composable, (d)Deployable, (e)Documented.

[10 marks]

4.3 Describe three types of interface incompatibility that may occur when developing

components [ 6 marks]

Question 5 [13 marks]

al Describe the term pattern in relation to object oriented software development. State

whythey are important? [3 marks]

52 With an example describe the Abstraction Occurrence pattern. [10 marks]

Question 6[16marks]

6.1 Quality managementis both an organizational and an individual project issue,

explain? [4 marks]

6.2 Whyis it important to have The Quality Assurance team independent from the

development team? [2 marks]

6.3 You are in charge of a Quality Assurance team, suggest 6 questions that your team

should consider whetheror no softwareisfit for its intended purpose. [6 marks]

6.4 Describe four characteristics that lead to a testable software. [4marks]

~END~