Quiz 1 FINALS (Fundamentals of Database system)

Developed by Codd (IBM) in 1970

• Relational Model

• Network Mode

• Hierarchical Model

• Entity-Relationship Mode

Introduced by Chen in 1976

• Hierarchical Model

• Entity-Relationship Model

• Relational Model

• Network Model

It consists of a series of row/column intersections.

• Relational Diagram

• Table

• Graphical Tool

• Schema

It is a collection of conceptual tools for describing data, data relationships, data semantics and consistency constraints.

• Database

• Data

• Data Modeling

• Data Model

It is the first step in database design and object programming.

• Database

• Data

• Data Modeling

• Data Model

Characteristic of an Entity.

• Entity

• Attribute

• Relationship

• Constraint

It is a logical structure that is represented by a “Tree”

• Relational Model

• Network Model

• Hierarchical Model

• Object Oriented Model

What relationship is Employee manages Store?

• One to Many

• One to One

• Many to Many

It is a databases structure that is modeled both data and their relationships in a single structure known as an object.

• Relational Model

• Network Model

• Hierarchical Model

• Object Oriented Model

The database structure that has a disadvantage called “island of information”

• Relational Model

• Network Model

• Hierarchical Model

• Object Oriented Model