What does the Entity Relationship Model (ERM) describe?

• Relationships among entities

• Data storage methods

• Database security measures

• User interface design

What shape represents an entity in an Entity Relationship Diagram (ERD)?

• Circle

• Diamond

• Rectangle

• Triangle

How should entity names be written in an ERD?

• In lowercase

• In plural form

• In capital letters and singular form

• In italics

What is each row in a relational table known as?

• Entity relationship

• Entity set

• Entity instance

• Entity attribute

What describes associations among data in an ER model?

• Entities

• Instances

• Relationships

• Attributes

What does connectivity refer to in an ERD?

• The type of relationship

• The size of the database

• The type of data

• The number of attributes

In Chen notation, how are relationships represented?

• By circles

• By diamonds

• By rectangles

• By ovals

What does Crow's Foot notation use to describe cardinality?

• Numbers

• Colors

• Symbols

• Shapes

What is the primary key in a table?

• A descriptive label

• A unique identifier for each record

• An optional attribute

• A foreign key reference

In the original Chen notation, how are attributes represented?

• By rectangles

• By diamonds

• By ovals

• By lines