Discussion
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- Question
An attribute that names or identifies entity instances is a(n):
Options- A. entity.
- B. attribute.
- C. identifier.
- D. relationship.
- Correct Answer
- identifier.
- 1. 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
- 2. 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
- 3. 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
- 4. 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
- 5. Entities of a given type are grouped into a(n):
Options- A. database.
- B. entity class.
- C. attribute.
- D. ERD. Discuss
- 6. Which of the following indicates the maximum number of entities that can be involved in a relationship?
Options- A. Minimum cardinality
- B. Maximum cardinality
- C. ERD
- D. Greater Entity Count (GEC) Discuss
- 7. Which type of entity has its relationship to another entity determined by an attribute in that other entity called a discriminator?
Options- A. Supertype entity
- B. Subtype entity
- C. Archetype entity
- D. Instance entity Discuss
- 8. Entities can be associated with one another in which of the following?
Options- A. Entities
- B. Attributes
- C. Identifiers
- D. Relationships Discuss
- 9. Which of the following indicates the minimum number of entities that must be involved in a relationship?
Options- A. Minimum cardinality
- B. Maximum cardinality
- C. ERD
- D. Greater Entity Count (GEC) Discuss
- 10. Which of the following refers to something that can be identified in the users' work environment, something that the users want to track?
Options- A. Entity
- B. Attribute
- C. Identifier
- D. Relationship Discuss
Data Modeling with ER Model problems
Search Results
Correct Answer: Weak entity
Correct Answer: Supertype entity
Correct Answer: itself
Correct Answer: Instance entity
Correct Answer: entity class.
Correct Answer: Maximum cardinality
Correct Answer: Subtype entity
Correct Answer: Relationships
Correct Answer: Minimum cardinality
Correct Answer: Entity
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