IM HANDOUT 4

What is the Entity Relationship Model (ERM)?

• A data model that describes relationships among entities at the conceptual level.

• A diagram that depicts an entity relationship model’s entities, attributes, and relations.

• A collection of similar entities.

• A set of attributes that describes particular characteristics of the entity.

What does an entity represent in the ERD?

• A rectangle.

• An oval.

• A line.

• A diamond.

What is the name of the relationship usually written as?

• An active or passive verb.

• A noun.

• An adjective.

• A pronoun.

In the original Chen notation, how are attributes represented?

• By ovals.

• By rectangles.

• By diamonds.

• By lines.

What does PK stand for in the context of attributes?

• Primary Key.

• Private Key.

• Public Key.

• Primary Knowledge.

Fill in the blank: A painter can ______ many paintings.

Fill in the blank: A manager can manage only ______ department.