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Database Systems - Section 3 Multiple Questions and Answers.
| 26. | Double Line indicate_____? | ||
| A. | Derived attributes | ||
| B. | Multi-valued Attributes | ||
| C. | Total participation of an entity in a relationship set | ||
| D. | Weak entity sets | ||
| 27. | Double Rectangle represent____? | ||
| A. | Derived attributes | ||
| B. | Multi-valued Attributes | ||
| C. | Total participation of an entity in a relationship set | ||
| D. | Weak entity sets | ||
| 28. | An entity set that has attributes to form a primary key; such an entity set is termed as______? | ||
| A. | Strong Entity set | ||
| B. | Weak Entity set | ||
| C. | Composite Entity set | ||
| D. | Owner entity set | ||
| 29. | For a weak entity set to be meaningful, it must be associated with another entity set called the __________? | ||
| A. | Strong entity set | ||
| B. | stronger entity set | ||
| C. | Owner entity set | ||
| D. | All of the above | ||
| 30. | In the relational modes, cardinality is termed as:? | ||
| A. | Number of tuples | ||
| B. | Number of attributes | ||
| C. | Number of tables | ||
| D. | Number of constraints. | ||
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