AQA A2 Computing 5.1 Conceptual Data Modelling

Question 1

Database

Answer 1

a structured collection of data

Question 2

Database management system

Answer 2

a software system that enables the definition, creation and maitenance of a database and which provides controlled access to this data base

Question 3

Data model

Answer 3

a method of describing the data, its structure, the way it is interrelated and the constraints that apply to it for a given system or organisation

Question 4

Conceptual model

Answer 4

a representation of the data requirements of an organisation constructed in a way that is independent of any software used to construct the database

Question 5

Entity

Answer 5

an object, person, event or thing of interest to an organisation and about which data is recorded

Question 6

Relationship

Answer 6

an association or link between two entities

Question 7

Degree of relationship

Answer 7

between two entities refers to the number of entity occurrences of one entity which are associated with just one entity occurrenc of the other and vice versa

Question 8

Entity occurrence

Answer 8

the details of one instance of the entity