2.3 Producing robust programs

Question 1

What are the defensive design considerations

Answer 1

Anticipating misuse
Authentication

Question 2

How do you maintain a program

Answer 2

Use subroutines
Name variables reasonably
Indentation
Commenting

Question 3

What is the difference between iterative and final testing

Answer 3

Iterative - testing while making the program
Final - testing after the code is complete

Question 4

What is the difference between syntax and logic errors

Answer 4

Syntax - the program will crash when you run it
Logic - the program will run but it won’t give you the desired result

Question 5

What are the types of test data

Answer 5

Normal - what you expect the user to enter and be accepted
Invalid - what the user enters and will be rejected
Boundary - values that are just inside the boundary that should be accepted, and values just outside the boundary that should not be accepted