IGCSE Computer Science 0478: Validation and verification
Students learn the validation checks (range, length, type, presence, format and check digit) and the verification checks (visual and double entry), and write a validated input algorithm.
One content description from the full IGCSE Computer Science 0478 — 7a Program Development Life Cycle journey. All 19 modules below are in that journey too, with the same content — add just these to a class, or the whole strand.
Modules (19)
1
Validation versus verification
2
Why input data is validated
3
Range check
4
Length check
5
Type check
6
Presence check
7
Format check
8
Check digit
9
Typing errors that a check digit detects
10
Re-asking for input until it is valid
11
Combining validation checks
12
What validation cannot do
13
Choosing a validation check for a field
14
Verifying data
15
Visual check
16
Double entry check
17
Double entry check in pseudocode
18
Choosing validation or verification
19
Writing a validated input algorithm in pseudocode
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