UNIT 15 PROOFING 0.0 / 5 ? ComputingValidation IGCSECIE Created by: T2000Created on: 22-10-15 16:29 Validation When computer checks data entered 1 of 10 Types of Validation 1. Length 2. Character 3. Range 4. Format 5. Presence 6. Consistency 7. Check digit 8. Limit 2 of 10 Length Check Checks that what is entered is the correct length 3 of 10 Character Check Checks if correct data type 4 of 10 Range Check Checks if data entered falls in a particular range 5 of 10 Limit check Check if data does not exceed the limit 6 of 10 Presence Check Checks if there are no fields are left blank 7 of 10 Format Check Checks that data is in the right format (postcode) 8 of 10 Consistency Check Make sure that there is a relationship between the data 9 of 10 Check Digit When you want to be sure that a range of numbers is entered correctly ( e.g. bar-code readers in supermarkets) 10 of 10
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