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- Question
Cascading updates refers to child rows being automatically deleted when a parent row is deleted.
Options- A. True
- B. False
- Correct Answer
- False
- 1. For every relationship, there are six possible sets of minimum cardinalities.
Options- A. True
- B. False Discuss
- 2. In a 1:1 relationship, the primary key placement is arbitrary.
Options- A. True
- B. False Discuss
- 3. An intersection table is required to represent M:N relationships.
Options- A. True
- B. False Discuss
- 4. 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 Discuss
- 5. When the parent entity is required, a new parent row can always be inserted.
Options- A. True
- B. False Discuss
- 6. Surrogate keys have much meaning for users.
Options- A. True
- B. False Discuss
- 7. When the parent entity is required, a new child row can always be inserted.
Options- A. True
- B. False Discuss
- 8. When transforming an entity-relationship model into a relational database design, each entity is represented as a table.
Options- A. True
- B. False Discuss
- 9. When the parent entity is required and the parent has a surrogate key, update actions can be ignored.
Options- A. True
- B. False Discuss
- 10. An ideal primary key is short, numeric and seldom changing.
Options- A. True
- B. False Discuss
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