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Home Database Modeling Data in the Organization Comments

  • Question
  • A good identifier is which of the following?


  • Options
  • A. One that can change over time
  • B. Can be null
  • C. One that is unique
  • D. Be intelligent

  • Correct Answer
  • One that is unique 


  • Modeling Data in the Organization problems


    Search Results


    • 1. A ternary relationship involves how many entities?

    • Options
    • A. 3 or less
    • B. 3
    • C. More than 3
    • D. 3 or more
    • Discuss
    • 2. A binary relationship cannot be which of the following?

    • Options
    • A. One-to-One
    • B. One-to-Many
    • C. Many-to-Many
    • D. Zero-to-Zero
    • Discuss
    • 3. A database application can perform which of the following activities?

    • Options
    • A. Add records
    • B. Read records
    • C. Update records
    • D. All of the above.
    • Discuss
    • 4. Metadata enables database designers and users to do all of the following except:

    • Options
    • A. sample data.
    • B. understand what data exist.
    • C. what the fine distinctions are between similar data items.
    • D. what the data mean.
    • Discuss
    • 5. Which of the following types of databases are the most common?

    • Options
    • A. Personal
    • B. Workgroup
    • C. Department
    • D. Enterprise
    • Discuss
    • 6. An entity name should be which of the following?

    • Options
    • A. A singular noun
    • B. Specific to the organization
    • C. Concise
    • D. All of the above.
    • Discuss
    • 7. A good business rule is which of the following?

    • Options
    • A. Declarative
    • B. Imprecise
    • C. Redundant
    • D. Compound
    • Discuss
    • 8. When the minimum and maximum number of instances of an entity is one, you know which of the following?

    • Options
    • A. Mandatory one
    • B. Optional one
    • C. Mandatory many
    • D. Cannot tell
    • Discuss
    • 9. An oval represents which of the following in an ERD?

    • Options
    • A. Attribute
    • B. Entity
    • C. Optional One
    • D. Relationship
    • Discuss
    • 10. A composite attribute is which of the following?

    • Options
    • A. An attribute that can be broken into components
    • B. An attribute that cannot be broken into components
    • C. Multiple attributes
    • D. An identifier
    • Discuss


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