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Entity Naming Guidelines and Attribute Classification

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Entity Naming Guidelines and Attribute Classification

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Questions and Answers

What three basic constructs make up the E-R model?

Tables, columns, rows
Functions, variables, loops
Data types, operators, conditions
Entities, attributes, relationships (correct)

In the E-R model, what is an entity type?

An attribute of an entity
A representation of an E-R diagram
A collection of entities sharing common properties (correct)
A relationship between two entities

Which of the following is NOT an example of an entity type?

CUSTOMER
WAREHOUSE
EMPLOYEE
SALE (correct)

What is the purpose of an entity in the E-R model?

To maintain data about a person or object (B) Signup and view all the answers

Which of the following is an example of an event entity in the E-R model?

SALE (B) Signup and view all the answers

What does an entity name represent in an E-R diagram?

A set of items (B) Signup and view all the answers

Which of the following statements about entity types is true?

Entity types are always singular in naming. (A) Signup and view all the answers

'STUDENT' is an example of what kind of entity in the E-R model?

Person (B) Signup and view all the answers

What does an entity represent in the E-R model?

A person, place, object, event, or concept (D) Signup and view all the answers

Which statement best describes an entity type in the E-R model?

A collection of entities with common characteristics (B) Signup and view all the answers