7 · Lesson 5 of 8
Validation and verification
Syllabus 7.5
What this lesson covers
- Explain the need for validation and verification checks
Key vocabulary
- Validation
- An automatic check that data is reasonable before it's accepted.
- Verification
- A check that data has been entered accurately.
- Range check
- Makes sure a value is between a lower and an upper limit.
- Length check
- Makes sure data has the right number of characters.
- Type check
- Makes sure data is the right data type.
- Presence check
- Makes sure data has been entered.
- Format check
- Makes sure data matches a set pattern.
- Check digit
- A digit calculated from the other digits and added to the end of a number, to detect entry errors.
- Double entry check
- Data is entered twice and the two entries are compared.
- Visual check
- The user looks over the data and confirms it's correct.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 10 terms
- Activity 1: Which check? · 8 questions
- Activity 2: Validation and verification quiz · 8 questions
- Activity 3: Validation or verification? · drag and drop