Laboratory Exam Tasks Instructions

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Laboratory Exam Tasks
Instructions 
Please do the following tasks. Write your answers in a single Word document and upload it to 
Platon as a zip file. The deadline is May 24, 12:30. 
NB: Collaborative work is strictly prohibited. No credit will be awarded for pretty much the 
same solutions. Submitting verbatim or modified solutions found over the Internet will result 
in failing marks. 
Tasks 
T1. 
The following are short statements of functional requirements for software applications. 
Review each of them, listing as many problems as you can. Justify your answers by referring 
to the guidelines. 
(a)
Simple interest calculation program
. This is a handy utility for users who are 
considering borrowing or lending money. A window pops up when the program starts. 
This has three fields entitled: ‘Principal:’, ‘Annual interest rate:’, and ‘Monthly interest 
payment:’. Whenever the user edits one of the fields the other two fields are 
automatically computed. 
(b)
Dispatcher automation system
. This system helps speed up the process of ambulance 
dispatching. When an emergency call is received, an automated voice recognition 
system classifies the case into categories depending on the level of emergency. All 
urgent cases are transmitted to the ambulance dispatcher, who will receive the patient’s 
record, a summary of the conversation with the operator, as well as the patient’s address 
and medical details if known. The dispatcher uses the system to obtain the number of 
the closest available ambulance. The ambulance operator receives all the information 
about the case. 
T2. 
Identify the 
attributes 
that might be present in the following classes. Try to be reasonably 
exhaustive. 
(a)
Series
(in a scheduling system for an independent television station). 
(b)
Passenger
(in an airline system). 
(c)
Event
(in a personal schedule system; a meeting might be a kind of event). 
(d)
Classroom
(in a university course scheduling system). 
T3. 
Apply the Player-Role pattern in the following situations. For each situation, show classes, 
the relationship between the classes, and the attributes in each class. 
(a)
Users of a system have different privileges. 
(b)
Managers can be given one or more responsibilities.