Exam Tips

Part of Defensive Design · Section 5 of 6

Exam TipsUnit: 3.2 ProgrammingGCSE
  • 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

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.

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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