O-LevelComputer ScienceAlgorithm design and problem-solving2210/22 · Oct/Nov 2023 · Q27 Marks
A type of validation check is a length check. Another type of validation check is used to make sure that any date entered is in the dd/mm/yyyy style: dd means day, mm means month and yyyy means year.
- (a)State the type of validation check used.[1]
- (b)Give one example of normal test data and one example of abnormal test data you should use to make sure the check in part (a) is working properly. State a reason for each of your choices of test data. Normal Reason Abnormal Reason[4]
- (c)Describe how a length check could be used with the date entered.[2]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.
- [1] Format check
- [4] One mark for each appropriate test data, max two
- One mark for each correct accompanying reason, max two
- For example: Normal - 30/12/1960 ... Reason ... (the date is written in the correct format and) should be accepted.
- Abnormal - 30/Dec/1960 ... Reason ... (the month is not written in the correct format and) should be rejected.
- [2] One mark per mark point, max two
- MP1 check that there are 10 characters in total
- MP2 if the date is too long/short it will be rejected
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