QUESTION 1

(a) Draw a use-case model for the above system. You must identify all possible actors and use-cases.

(b)

• Assume you are using the Rational Unified Process as Object-Oriented development methodology for building the system. Briefly describe the different phases and workflows of the RUP.
• What are the benefits that might be gained when using such a life-cycle?

(c) Explain the difference between a structured methodology for developing software and the object-oriented approach. Use examples to illustrate your answer.

QUESTION 2

(a) Build a class model for the above system. You must identify all possible classes, their relationships, relationship multiplicities, two attributes and two methods for each class.

(b) Explain the difference between a link and an association. Use a simple example to illustrate your answer.

(c) Briefly explain the terms ‘cohesion' and ‘coupling'.

(d) What are the main factors which contribute to software complexity?

QUESTION 3

(a) Draw a Sequence Diagram for the process of assigning a driver to a particular bus going on a special route. Show clearly the objects involved and the flow of messages.

(b) What is a state diagram? Use an example from the case study to illustrate your answer.