UNIVERSITY EXAMINATIONS: 2014/2015
ORDINARY EXAMINATION FOR THE BACHELOR OF SCIENCE
IN INFORMATION TECHNOLOGY
BIT 2107 OBJECT ORIENTED ANALYSIS & DESIGN
DATE: APRIL, 2015 TIME: 2 HOURS
INSTRUCTIONS: Answer Question ONE and any other TWO
QUESTION ONE. (COMPULSORY)
(a) Give the meaning of the following terms in relations to Object Oriented field:
(12 marks)
i) Object
ii) Class
iii) Association
iv) Aggregation
v) Encapsulation
vi) Inheritance
(b) Highlight any three limitations of the structured approach to software development.
(3 Marks)
(c) Explain the steps followed in the analysis and design stages of the object-oriented
approach to systems development. (4 Marks)
(d) Define Unified Modeling Language (UML) in object orientation and describe
its main building blocks. (4 Marks)
(e) Define sequence diagram and show symbols used to draw them. (4 Marks)
(f) Describe the three views used in UML to explain all 7 diagrams (3 Marks)
QUESTION TWO
(a) The terms visualization and documentation are some of the elements achieved via the
use of UML. Explain the meaning of these two terms. (4 Marks)
(b) (i) Explain the benefits of the Unified Software Development Process (USDP).
(4 Marks)
(ii) Using a diagram explain the main phases of USDP. (10 Marks)
(c) State the difference between a product and a project in software development.
(2 Marks)
QUESTION THREE
(a) In my local food kiosk, you find the following items: Maize, bananas, beans and
Oranges. Draw a hierarchical class diagram to illustrate the kiosk. (4 Marks)
(b) (i) Using suitable symbols, describe the main parts of a use case diagram.
(6 Marks)
(ii) Describe the following use case relationships, giving an example scenario of each
one of them: INCLUDES, EXTENDS (4 Marks)
(c) Draw a suitable use case diagram based on KCA University library system. Use a
minimum of five functions in your diagram.
(6 Marks)
QUESTION FOUR
(a) (i) What is a state diagram? (2 Marks)
(ii) Create a state diagram for this scenario. (10 Marks)
The washing machine has 2 major states : pause and runnable. A washing
machine in the runnable state cycles around the following substates – stopped,
filling, washing and spinning. The machine can only start running if the door is
closed and the machine will pause immediately the door is opened. The washing
machine runs to a program. The machine will restart the program each time it reenters the runnable state
(b) What do you understand by the following terms as used in Object oriented concepts?
(i) Prototyping (2 Marks)
(ii) Spiral Model (2 Marks)
(iii) Inception (2 Marks)
(iv) Transition (2 Marks)
QUESTION FIVE
(a) Consider the following scenario.
“Nurses work on a particular ward. Doctors are assigned a number of patients and
during their rounds visit a number of different wards. If a doctor needs advice
he/she may consult with a specialist consultant regarding a particular patient. The
specialist may see the patient. Specialists are basically senior doctors.”
Draw the class diagram to include any inheritance, aggregation or composition and
multiplicities where possible. (12 Marks)
(b) A student in KCA University intends to go for a class. Draw his possible activity
diagram. Remember to include swim lanes, forks , joins among others. (8 Marks)
