CE 0.2

In an ER diagram, an entity is represented by:

• Circle

• Rectangle

• Diamond

• Ellipse

An attribute in an ER diagram is shown using:

• Ellipse

• Rectangle

• Diamond

• Triangle

Which of the following represents a relationship in an ER diagram?

• Ellipse

• Diamond

• Rectangle

• Line

A weak entity is represented by:

• Single rectangle

• Double rectangle

• Circle

• Dashed line

Which of these is a type of attribute?

• Simple

• Circular

• Polygon

• Binary

A derived attribute is shown by:

• Solid ellipse

• Dashed ellipse

• Double rectangle

• Double diamond

A multivalued attribute is shown using:

• Single ellipse

• Double ellipse

• Dashed rectangle

• Solid diamond

In ER diagrams, total participation is shown by:

• Single line

• Double line

• Dotted line

• Wavy line

An entity type with no key attribute is called:

• Strong entity

• Weak entity

• Derived entity

• Multivalued entity

Primary key in an ER diagram is usually:

• Underlined

• Bold

• Italic

• Circled