O-LevelComputer ScienceSoftware2210/22 · May/June 2019 · Q56 Marks

Explain what is meant by validation and verification. Give an example for each one.

Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

[6] (Validation Two from:) automated checking
[6] (Validation Two from:) checking that data is reasonable / of a certain type
[6] (Validation Two from:) checking that data meets certain criteria
[6] (Example 1 mark) range check // length check // type check // check digit etc.
[6] (Verification Two from:) checking that data has not changed...
[6] (Verification Two from:) during input to a computer
[6] (Verification Two from:) during transfer between computers / devices
[6] (Example 1 mark) double entry // checking against original // visual check // use of checksum etc.

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Topic: Software, O-Level Computer Science (syllabus 2210). Structured question, 6 marks.
Source: O-Level Computer Science, May/June 2019 Paper 2 Variant 2, question 5.

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