PrepWisePrepWiseComputer Science
Robust ProgramsMedium Exam FrequencyOCR

Input Validation

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 be part of a solid GCSE revision cycle.

Study this topic

1

The Bouncer at the Door

Introduction2

Types of Validation

Key Facts3

Deep Dive: Validation Examples

Deep Dive4

Memory Trick: RPTFL-C

Key Facts5

Exam Tips

Exam Tips

Sample 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)

Sample Questions

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

15

exam-style questions

8

revision flashcards

Ready to revise Input Validation?

Get personalised daily study plans, adaptive quizzes, and spaced repetition flashcards.

Join Alpha

Previous topic

Defensive Design

Next topic

Testing