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10 Questions

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Business Rules in Database Management

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Questions and Answers

What is a good characteristic of a business rule?

Redundant–repetitive and unnecessary

Declarative–how, not what

Consistent–internally but not externally (correct)

Vague–unclear, ambiguous meaning

What is a good characteristic of a data name?

Unrelated to business–only technical characteristics (correct)

Readable–complex and difficult to understand

Non-unique–can be repeated

Technical–related to technical characteristics

What corresponds to a row in a table in the E-R model?

Attribute symbols

Entity instance (correct)

Relationship instance

Entity Type

What is specified by relationship cardinalities in the E-R model?

Number of entity instances involved Signup and view all the answers

What should an entity be according to the E-R model constructs?

It should be an entity type Signup and view all the answers

What is an entity in the context of database modeling?

An object that will be composed of multiple attributes Signup and view all the answers

Which of the following is not a classification of attributes in database modeling?

An attribute that could be a key…satisfies the requirements for being an identifier Signup and view all the answers

What is an identifier (key) in the context of database modeling?

An attribute that uniquely identifies individual instances of an entity type Signup and view all the answers

What is a composite attribute in database modeling?

An attribute broken into component parts Signup and view all the answers

In database modeling, what do intelligent identifiers refer to?

Containing locations or people that might change Signup and view all the answers