O-LevelComputer ScienceProgramming2210/21 · May/June 2023 · Q38 Marks
Describe what is meant by data validation.
- (a)Describe what is meant by data validation.[2]
- (b)A validation check is used to make sure that any value that is input is an integer between 30 and 200 inclusive. Give one example of each type of test data to check that the validation check is working as intended. Each example of test data must be different. Give a reason for each of your choices of test data. Normal test data Reason Abnormal test data Reason Extreme test data Reason[6]
Mark scheme
Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.
- [1] (a) Validation is an automated check carried out by a computer;
- [1] (a) to make sure the data entered is sensible/acceptable/reasonable
- [1] (b) Normal - 75
- [1] (b) Reason - the data lies within the required range and should be accepted
- [1] (b) Abnormal - Sixty
- [1] (b) Reason - this is the wrong data type and should be rejected
- [1] (b) Extreme - 200
- [1] (b) Reason - the highest value in the required range that should be accepted
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