Section A

Question 1

What’s the difference between data, information and knowledge?

Answer 1

Data - something without direct meaning or context

Information - Data with context and a meaning

Knowledge - Understanding of information, conclusions and judgements

Question 2

What does GIGO stand for?

Answer 2

Garbage In, Garbage Out.

Question 3

Give the definition of Validation.

Answer 3

The use of computer software to check that what has been entered is reasonable.

Question 4

Name 6 Validation techniques.

Answer 4

• Type Check
• Range Check
• Presence Check
• Format Check
• Length Check
• Look-up List

Question 5

What are the benefits of using a look-up list?

Answer 5

• Speeds up data entry
• Improves accuracy
• Only presents available options

Question 6

Give the definition of Verification.

Answer 6

To check the data you have entered against the original source.

Question 7

Give 3 Verification techniques.

Answer 7

• Enter data twice
• Proof reading
• CAPTCHA code

Question 8

Give the cons for the 3 verification methods.

Answer 8

Entering data twice - not suitable for large amounts of data, the same mistake could be made twice.

Proof reading - time consuming and could easily miss something.

CAPTCHA code - humans can find it hard to decipher words.