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Questions and Answers
What is a good characteristic of a business rule?
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?
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?
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?
What is specified by relationship cardinalities in the E-R model?
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What should an entity be according to the E-R model constructs?
What should an entity be according to the E-R model constructs?
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What is an entity in the context of database modeling?
What is an entity in the context of database modeling?
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Which of the following is not a classification of attributes in database modeling?
Which of the following is not a classification of attributes in database modeling?
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What is an identifier (key) in the context of database modeling?
What is an identifier (key) in the context of database modeling?
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What is a composite attribute in database modeling?
What is a composite attribute in database modeling?
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In database modeling, what do intelligent identifiers refer to?
In database modeling, what do intelligent identifiers refer to?
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