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Questions and Answers
What is displayed in a rectangular box in an ER diagram?
What is displayed in a rectangular box in an ER diagram?
- Attributes
- Relationships
- Value sets
- Entity types (correct)
How are key attributes represented in an ER diagram?
How are key attributes represented in an ER diagram?
- They are displayed in double ovals
- They are underlined (correct)
- They are italicized
- They are displayed in rectangles
How are multivalued attributes displayed in an ER diagram?
How are multivalued attributes displayed in an ER diagram?
- In rectangles
- In double ovals (correct)
- Underlined
- In single ovals
What are the components that make up a composite attribute connected to in an ER diagram?
What are the components that make up a composite attribute connected to in an ER diagram?
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What does A(e) refer to in the context of attributes?
What does A(e) refer to in the context of attributes?
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What are the three main concepts of the ER model?
What are the three main concepts of the ER model?
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Which of the following is NOT an initial entity type identified for the COMPANY database schema?
Which of the following is NOT an initial entity type identified for the COMPANY database schema?
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What type of attribute is represented by a single oval in an ER diagram?
What type of attribute is represented by a single oval in an ER diagram?
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Which statement about the initial design of entity types is true?
Which statement about the initial design of entity types is true?
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What does a relationship in the ER model relate?
What does a relationship in the ER model relate?
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