Test 2 Postmortem

1
Test 2 Postmortem

• Dennis Burford
• dburford_at_cs.uct.ac.za

2
Results

• Average 20/35
• Best 30
• Worst 8
• (Test 1Average 28 Best 32 Worst19)

3
Question 1

• What are the three main criteria used to measure
  the success of a software project. 3

4
Question 1

• What are the three main criteria used to measure
  the success of a software project. 3
• To specification (on brief)
• On budget
• On time

5
Question 2a

• Give the four steps in Booch's software
  development approach for Object Oriented Systems.
  4

6
Question 2a

• Give the four steps in Booch's software
  development approach for Object Oriented Systems.
  4
• Find Classes
• Find Behaviours for each class
• Establish interclass relationships
• Implement classes and methods

7
Question 2b

• Each entry in the scheduler is either an
  appointment, a to-do item, or amemo. Each entry
  has the date and the time it is entered. An
  entry can be locked, and if locked, the user
  cannot modify it. For an appointment entry,
  include the person and the place of meeting. For
  a to-do entry, include a short description of a
  task and the due date. For a memo, include a
  text. Use the Java ''Date" class to record the
  date and time of an entry. The scheduler is a
  list of entries. There should be functionality
  for displaying all entries and adding, deleting
  or editing an entry. 7

8
Scheduler
display()
addEntry()
deleteEntry()
editEntry()
N
Date
Entry
-date
-date Date
or...
-time
modify()
lock()
or...
Appointment
To-Do
Memo
-person String
-Text String
-dueDate Date -description String
-place String
9
Question 3a

• Discuss some of the interface design principles
  that result from a consideration of human
  capabilities. 5

10

• Memory (7 2 things)
• Avoid clutter (Economy)
• Avoid Cognitive Overload
• Consistency

Perception and Visual Recognition

• Affordances
• User familiarity
• Past Experience
• Match interface to
• user group
• Intuitive display of
• status, info and
• controls

No Surprises
Human Capabilities

• Mistakes
• Confirmation
• Recoverability

Direct Manipulation
11
Question 3b

• Name two possible uses for color in a user
  interface. 2

12
Question 3b

• Name two possible uses for color in a user
  interface. 2
• Drawing attention (eg. a warning )
• Indicating status
• Conveying complex information
• Others..?

13
Question 4 6

• public class Numbers
• static int nums new int4
• public static void main( String args )
• throws NumberFormatException
• for (int i0 iltargs.length i )
• numsi Integer.parseInt( argsi
  )
• System.out.println( numsi )

14
Question 4 6

• public static void main( String args )
• for (int i0 iltargs.length i )
• try
• numsi Integer.parseInt( argsi )
• catch (NumberFormatException nfe)
• numsi -1
• System.out.println( numsi )

15
Question 5

• public class University
• // private data storing all student data
• ....
• public String makeStudNum(String surname,
  String firstName)
• // generates and returns a new student number
  based on the
• // student's surname and first name

The makeStudNum method creates student numbers in
the same way as student numbers are created at
UCT. Write a main method which will thoroughly
test the makeStudNum method. The driver method
should use normal, extreme and erroneous test
cases. Indicate with comments the type of each
test case. 8
16
Question 5

• public static void main (String args)
• University uct new University()
• String result
• // Normal
• result uct.makeStudNum( Burford, Dennis )
• // Extreme
• result uct.makeStudNum( S, F )
• result uct.makeStudNum( XXXXXXXXXXX,
  YYYYYYYYYY )
• // Erroneous
• result uct.makeStudNum( S, )
• result uct.makeStudNum( , )
• result uct.makeStudNum( 312, 765 )
• result uct.makeStudNum( !, )