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Part of Input Validation — GCSE Computer Science

This exam tips covers Exam Tips within Input Validation for GCSE Computer Science. Revise Input Validation in Robust Programs for GCSE Computer Science with 15 exam-style questions and 8 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. 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 ≠ Verification: Validation checks data is sensible; verification checks it's what user intended (e.g., enter twice)
  • Doesn't prove accuracy: Data can be valid but wrong (fake name passes validation)
  • Combine checks: Often need multiple validation types for one field

Keep building this topic

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

Memory Trick: RPTFL-CThe Bouncer at the DoorTypes of Validation

Practice Questions for Input Validation

A program asks the user to enter a score between 1 and 10. Which validation check should be used to ensure the number is within this range?

  • A. Type check
  • B. Range check
  • C. Length check
  • D. Presence check
1 markfoundation

A registration form collects a username. The username must: not be blank, contain only letters and numbers, and be between 6 and 20 characters long. Identify three validation checks and explain what each one does for this input.

3 marksstandard

Quick Recall Flashcards

What is validation?
Checking input data is sensible and follows rules before processing
What is a type check?
Checking data is the correct data type (e.g., integer not text)

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