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Database Systems - Section 3 Multiple Questions and Answers.
| 11. | The Rectangles divided into two parts represents: | ||
| A. | Relationship set | ||
| B. | Attributes of a relationship set | ||
| C. | Entity set | ||
| D. | Primary key | ||
| 13. | We indicate roles in E-R diagrams by labeling the lines that connect ___________ to __________? | ||
| A. | Diamond , diamond | ||
| B. | Rectangle, diamond | ||
| C. | Rectangle, rectangle | ||
| D. | Diamond, rectangle | ||
| 14. | An entity set that does not have sufficient attributes to form a primary key is termed a __________? | ||
| A. | Strong entity set | ||
| B. | Variant set | ||
| C. | Weak entity set | ||
| D. | Variable set | ||
| 15. | For a weak entity set to be meaningful, it must be associated with another entity set, called the? | ||
| A. | Identifying set | ||
| B. | Owner set | ||
| C. | Neighbour set | ||
| D. | Strong entity set | ||
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