2.3.1 Defensive design

Question 1

What does anticipating misuse include?

Answer 1

Users tyring to access parts of the program they should not
Users intentionally trying to break or crash a system
Accidental misuse and key presses

Question 2

How can authentication be checked?

Answer 2

Use of passwords to prevent unauthorised access
Specific uses can be given limited functionality
Additional security questions can be asked

Question 3

How can we check input validation?

Answer 3

Comparing against defined responses
Allowing only specific data types
Is the data entered outside of an expected range?

Question 4

How do you keep a program well maintained?

Answer 4

Comments
Indentation
Naming conventions
Sub-programs

Question 5

What are comments?

Answer 5

Programmer notes to describe functionality

Question 6

What is indentation?

Answer 6

seperates statements into groups and highlights features

Question 7

What is naming conventions?

Answer 7

Ensuring variable names are sensible and purposeful, such as firstName or productCode

Question 8

What are sub-programs?

Answer 8

use these to avoid repetition and when they will benefit the program