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- Question
In which of the following can many entity instances of one type be related to many entity instances of another type?
Options- A. One-to-One Relationship
- B. One-to-Many Relationship
- C. Many-to-Many Relationship
- D. Composite Relationship
- Correct Answer
- Many-to-Many Relationship
- 1. Properties that describe the characteristics of entities are called:
Options- A. entities.
- B. attributes.
- C. identifiers.
- D. relationships. Discuss
- 2. In a one-to-many relationship, the entity that is on the one side of the relationship is called a(n) ________ entity.
Options- A. parent
- B. child
- C. instance
- D. subtype Discuss
- 3. In which of the following is a single-entity instance of one type related to many entity instances of another type?
Options- A. One-to-One Relationship
- B. One-to-Many Relationship
- C. Many-to-Many Relationship
- D. Composite Relationship Discuss
- 4. Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity?
Options- A. Supertype entity
- B. Subtype entity
- C. Archetype entity
- D. Instance entity Discuss
- 5. Which of the following is NOT a basic element of all versions of the E-R model?
Options- A. Entities
- B. Attributes
- C. Relationships
- D. Primary keys Discuss
- 6. Entities of a given type are grouped into a(n):
Options- A. database.
- B. entity class.
- C. attribute.
- D. ERD. Discuss
- 7. Which type of entity represents an actual occurrence of an associated generalized entity?
Options- A. Supertype entity
- B. Subtype entity
- C. Archetype entity
- D. Instance entity Discuss
- 8. A recursive relationship is a relationship between an entity and ________ .
Options- A. itself
- B. a subtype entity
- C. an archetype entity
- D. an instance entity Discuss
- 9. Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?
Options- A. Supertype entity
- B. Subtype entity
- C. Archetype entity
- D. Instance entity Discuss
- 10. Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier?
Options- A. Weak entity
- B. Strong entity
- C. ID-dependent entity
- D. ID- independent entity Discuss
Data Modeling with ER Model problems
Search Results
Correct Answer: attributes.
Correct Answer: parent
Correct Answer: One-to-Many Relationship
Correct Answer: Archetype entity
Correct Answer: Primary keys
Correct Answer: entity class.
Correct Answer: Instance entity
Correct Answer: itself
Correct Answer: Supertype entity
Correct Answer: Weak entity
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