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Modeling Data in the Organization
Comments
Question
Relationships cannot have attributes.
Options
A. True
B. False
Correct Answer
False
Modeling Data in the Organization problems
Search Results
1. A logical representation of the data for an organization or for a business area is known as an entity-relationship model.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
2. Business rules and policies are universal.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
3. An attribute is a person, place, object, event in a user environment.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
4. A time stamp is a time value that is associated with a data value.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5. Some business rules cannot be represented in common data modeling notation.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
6. Weak entities do not get mapped into a relation.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
7. In a 1:M relationship, the primary key on the one side migrates to the many side to become the foreign key on the many side.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
8. A primary key may be null.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
9. The primary key of the new relation in a many-to-many relationship is a composite key comprised of the primary keys of each of the binary entities.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
10. An enterprise key is a primary key whose value is unique for a given relation.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
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