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Part of Defensive Design — GCSE Computer Science

This exam tips covers Exam Tips within Defensive Design for GCSE Computer Science. Revise Defensive Design in Robust Programs for GCSE Computer Science with 15 exam-style questions and 8 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 5 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 5 of 5

Practice

15 questions

Recall

8 flashcards

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

Keep building this topic

Read this section alongside the surrounding pages in Defensive Design. That gives you the full topic sequence instead of a single isolated revision point.

Memory Trick: VSCAMBuilding Software ArmourDefensive Design Principles

Practice Questions for Defensive Design

What is the purpose of input validation in a program?

  • A. To check that the user is who they claim to be
  • B. To check that input data meets specified rules before processing
  • C. To encrypt data before it is stored
  • D. To remove duplicate records from a database
1 markfoundation

Describe three different types of validation check, giving an example of each.

3 marksstandard

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

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