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Questions and Answers
Which of the following statements is true about attributes?
Which of the following statements is true about attributes?
- Attributes can only be optional.
- Domains are not related to attributes.
- Attributes can be simple or composite (correct)
- Primary keys identify sets of possible values for attributes.
Which of the following is true about multi-valued attributes?
Which of the following is true about multi-valued attributes?
- They are implemented in RDBMS.
- They should not be implemented in RDBMS. (correct)
- They are made up of more than one attribute
- They can only have one value
What are derived attributes?
What are derived attributes?
- Attributes that are required
- Attributes that are calculated from other attributes. (correct)
- Attributes that are made up of more than one attribute
- Attributes that identify entity instances.
Study Notes
- Attributes can be required or optional.
- Domains are sets of possible values for attributes.
- Primary keys uniquely identify entity instances.
- Composite identifiers are made up of more than one attribute.
- Attributes can be simple or composite.
- Single-valued attributes can only have one value.
- Multi-valued attributes have many values but should not be implemented in RDBMS.
- Implementing multi-valued attributes involves creating new attributes or entities.
- Derived attributes are calculated from other attributes.
- Computed attributes can be simple or complex.
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Description
Test your knowledge of database design with this quiz on entity attributes. From understanding the difference between required and optional attributes to identifying primary keys and composite identifiers, this quiz covers the essentials. You'll also learn about domains, multi-valued attributes, and computed attributes. Sharpen your database design skills and take the quiz now.
