O-LevelComputer ScienceData Representation2210/21 · May/June 2021 · Q23 Marks
Tick (✔) one box in each row to identify if the statement is about validation, verification or both.
- (i)Entering the data twice to check if both entries are the same.
- (ii)Automatically checking that only numeric data has been entered.
- (iii)Checking data entered into a computer system before it is stored or processed.
- (iv)Visually checking that no errors have been introduced during data entry.
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [1] Entering the data twice to check if both entries are the same. -> Verification
- [1] Automatically checking that only numeric data has been entered. -> Validation
- [1] Checking data entered into a computer system before it is stored or processed. -> Both
- [1] Visually checking that no errors have been introduced during data entry. -> Verification
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