MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Database knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
FUNCTIONAL_DEPENDENCIES_ARE_A_GENERALIZATION_OF?$ |
| A. | Key dependencies |
| B. | Relation dependencies |
| C. | Database dependencies |
| D. | None of the mentioned |
| Answer» B. Relation dependencies | |
| 2. |
Which_of_the_following_is_another_name_for_a_weak_entity?$ |
| A. | Child |
| B. | Owner |
| C. | Dominant |
| D. | All of the mentioned |
| Answer» B. Owner | |
| 3. |
The completeness constraint may be one of the following: Total generalization or specialization, Partial generalization or specialization. Which is the default? |
| A. | Total |
| B. | Partial |
| C. | Should be specified |
| D. | Cannot be determined |
| Answer» C. Should be specified | |
| 4. |
Consider the employee work-team example, and assume that certain employees participate in more than one work team. A given employee may therefore appear in more than one of the team entity sets that are lower level entity sets of employee. Thus, the generalization is _____________ |
| A. | Overlapping |
| B. | Disjointness |
| C. | Uniqueness |
| D. | Relational |
| Answer» B. Disjointness | |
| 5. |
A _____________ constraint requires that an entity belong to no more than one lower-level entity set. |
| A. | Disjointness |
| B. | Uniqueness |
| C. | Special |
| D. | Relational |
| Answer» B. Uniqueness | |
| 6. |
If an entity set is a lower-level entity set in more than one ISA relationship, then the entity set has |
| A. | Hierarchy |
| B. | Multilevel inheritance |
| C. | Single inheritance |
| D. | Multiple inheritance |
| Answer» E. | |
| 7. |
There are similarities between the instructor entity set and the secretary entity set in the sense that they have several attributes that are conceptually the same across the two entity sets: namely, the identifier, name, and salary attributes. This process is called |
| A. | Commonality |
| B. | Specialization |
| C. | Generalization |
| D. | Similarity |
| Answer» D. Similarity | |
| 8. |
The refinement from an initial entity set into successive levels of entity subgroupings represents a ________ design process in which distinctions are made explicit. |
| A. | Hierarchy |
| B. | Bottom-up |
| C. | Top-down |
| D. | Radical |
| Answer» D. Radical | |
| 9. |
Which relationship is used to represent a specialization entity? |
| A. | ISA |
| B. | AIS |
| C. | ONIS |
| D. | WHOIS |
| Answer» B. AIS | |
| 10. |
The entity set person is classified as student and employee. This process is called _________ |
| A. | Generalization |
| B. | Specialization |
| C. | Inheritance |
| D. | Constraint generalization |
| Answer» C. Inheritance | |