ERD

A person name, birthday and national insurance number are all examples of _________?

• Entities

• Relationships

• Attributes

• Descriptors

An attribute associated with a relationship type is called

• Single valued attribute

• Descriptive attribute

• Key attribute

• Simple attribute

Entity type in ER diagram is represented as

• Double diamonds

• Diamond

• Rectangle

• Oval

Weak entity set is represented as

• Underline

• Double diamond

• Double line

• Double rectangle

If you were collecting and storing information about your music collection, an album would be considered a (n)

• Relation type

• Instance

• Attribute

• Entity type

In which of the following is single entity instance of one type related to many entity instances of another type?

• One to one relationship

• One to many relationship

• Many to many relationship

Properties that describe the characteristics of entities are called

• Entities

• Identifiers

• Attributes

• Relationships

In which of the following is a single entity instance of one type of related to a related to a single instance of another type?

• One to one relationship

• Many to one relationship

• One to many relationship

• Many to many relationship