data-models-into-database-designs database question and answers -Page 3

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Data Models into Database Designs problems

1. The DBMS allows surrogate keys to be changed.
Options
A. True
B. False

Correct Answer: False

2. For every relationship, there are six possible referential integrity actions.
Options
A. True
B. False

Correct Answer: True

3. In 1:N relationships, which entity becomes the parent entity is arbitrary.
Options
A. True
B. False

Correct Answer: False

4. A foreign key is used to implement relationships between tables.
Options
A. True
B. False

Correct Answer: True

5. All primary keys are required.
Options
A. True
B. False

Correct Answer: True

6. When the parent entity is required, a new parent row can always be inserted.
Options
A. True
B. False

Correct Answer: True

7. When the parent entity is required, cascading updates and cascading deletions should be allowed or the associated actions on the parent should be prohibited.
Options
A. True
B. False

Correct Answer: True

8. An intersection table is required to represent M:N relationships.
Options
A. True
B. False

Correct Answer: True

9. In a 1:1 relationship, the primary key placement is arbitrary.
Options
A. True
B. False

Correct Answer: True

10. For every relationship, there are six possible sets of minimum cardinalities.
Options
A. True
B. False

Correct Answer: False

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