GCSE ICT: Questions on Data Validation

Part 1

(Doyle Chapter 4)

1. Describe three problems that could arise from storing incorrect data in a computer system. (3)
2. What is GIGO? Why is it important? (2)
3. Describe six types of error that can occur during data entry. (3)
4. Explain the term 'data validation'. (2)
5. Explain the term 'data verification'. (2)
6. How are passwords verified when you enter them into a computer system, for example when setting up an email account or changing your network password. (2)

Total: 14

Part 2

1. Write down the ISBN of your text book. Calculate the check digit as described in the text book and verify that the last digit of the ISBN is correct. (4)
2. Describe six other validation checks. (6)

Total: 10

Part 3

1. Explain how data can be checked in text sources. (3)
2. Complete the Case Study at the end of chapter 4.

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