Data Model

What is data model?

• Simple representations of complex real-world data structures

• Iterative and progressive process of creating a specific data model for a determined problem domain

• Abstraction of a real-world object or event

Below are the reasons why the data model is important EXCEPT

• Are a communication tool

• Give an overall view of the database

• Organize data for •various users

• Are an abstraction for the creation of bad database

Which are the basic building block(s) for data model?

Hint: Please tick more than one answer

• Entity

• Relationship

• Constraint

• Cardinality

Written documentation is one of the source of Business Rules

• True

• False

The picture above is example of

• Network Model

• Hierarchical Model

• Object Oriented Model

• No SQL

In Relational Model, tuple represents as

• rows

• columns

(a)   uses graphic representations to model database components.

What is the relationship shown by the above Entity Relationship Diagram(ERD)?

• one-to-one

• many-to-many

• one-to-many

What are the 3 characteristics of Big Data?

• Volume,Velocity,Variety

• Volume,Validate,Vaganza

• Velocity, Vast, Vain

There are __________ levels of data abstraction.

• 3

• 4

• 5

• 6