10 Questions
What three basic constructs make up the E-R model?
Entities, attributes, relationships
In the E-R model, what is an entity type?
A collection of entities sharing common properties
Which of the following is NOT an example of an entity type?
SALE
What is the purpose of an entity in the E-R model?
To maintain data about a person or object
Which of the following is an example of an event entity in the E-R model?
SALE
What does an entity name represent in an E-R diagram?
A set of items
Which of the following statements about entity types is true?
Entity types are always singular in naming.
'STUDENT' is an example of what kind of entity in the E-R model?
Person
What does an entity represent in the E-R model?
A person, place, object, event, or concept
Which statement best describes an entity type in the E-R model?
A collection of entities with common characteristics
Learn about naming conventions for entities, including singular nouns and capital letters. Understand the concepts of required and optional attributes in entity types. Explore how attributes relate to entity instances.
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