This exam tips covers Exam Tips within Defensive Design for GCSE Computer Science. Revise Defensive Design in 3.2 Programming for GCSE Computer Science with 15 exam-style questions and 8 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 6 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Exam Tips
- Validation vs Sanitisation: Validation checks data is acceptable; sanitisation cleans/removes dangerous content
- Why maintain? Other programmers may need to update your code
- Link to security: Input sanitisation prevents SQL injection and XSS attacks
Practice questions for Defensive Design
What is the purpose of input validation in a program?
Describe three different types of validation check, giving an example of each.
Quick recall flashcards
Why use comments?
To explain code so others can understand and maintain it
What is authentication?
Verifying a user's identity before granting access to a system