Defensive Design

Question 1

How can programmers protect their code from errors

Answer 1

• anticipate how misuse
• well maintained
• reduce errors

Question 2

How can you prevent inputs from being exploited

Answer 2

• input sanitisation = remove unwanted characters

- input validation = make sure meets criteria before pass on

Question 3

what is check digit

Answer 3

• numerical data entered correctly

Question 4

what is authentication and give me a example

Answer 4

confirm the identity using strong passwords change regularly limit the attempts ask random selection of characters

Question 5

how can a program be maintained

Answer 5

• comments: explaining key features: well written clear for understanding
• indentation: separate statements allow flow
• variables: programmers keep track and recognise variables throughout