Data and Quality of Data

Define the term data
(2)

Define the term information
(2)

Define the term knowledge
(2)

State the formula used to define information
(3)

Give 3 types of data
(3)

In the context of a supermarket, give an example of Data, Information and Knowledge
(3)

State 4 factors which make good quality data
(4)

Explain the meaning of the term GIGO
(2)

Explain what encoding is and give a suitable example
(2)

Describe 2 reasons why data is encoded
(2)

It is important that data entered into the computer is accurate. Explain 2 consequences of processing inaccurate data
(2)

In a database system a user has to input data into certain fields using a keyboard. Give 3 different types of errors the user could make
(3)

A person’s date of birth is entered into a database. State and describe 2 things the validation program could check regarding this date as part of validation
(2)

Describe what a range check is in terms of data validation. Give an example
(2)

Describe what a presence check is in terms of data validation. Give an example
(2)

Topic 1
Data and Quality of Data
Exam Questions