Discussion
Home ‣ Database ‣ Data Modeling with ER Model Comments
- Question
Properties that describe the characteristics of entities are called:
Options- A. entities.
- B. attributes.
- C. identifiers.
- D. relationships.
- Correct Answer
- attributes.
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n):
Options- A. transitive dependency.
- B. insertion anomaly.
- C. referential integrity constraint.
- D. normal form. Discuss
- 6. 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 Discuss
- 7. Entities of a given type are grouped into a(n):
Options- A. database.
- B. entity class.
- C. attribute.
- D. ERD. Discuss
- 8. 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
- 9. 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
- 10. 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
Data Modeling with ER Model problems
Search Results
Correct Answer: parent
Correct Answer: One-to-Many Relationship
Correct Answer: Archetype entity
Correct Answer: Primary keys
Correct Answer: referential integrity constraint.
Correct Answer: Many-to-Many Relationship
Correct Answer: entity class.
Correct Answer: Instance entity
Correct Answer: itself
Correct Answer: Supertype entity
Comments
There are no comments.More in Database:
Programming
Copyright ©CuriousTab. All rights reserved.