Database-Management-System
August 26, 2024Database-Management-System
August 26, 2024ER-Model
|
Question 19
|
Which of the following statements is TRUE?
|
The cardinality ratio for a binary relationship specifies the maximum number of relationship instances that an entity can participate in.
|
|
|
The cardinality ratio for a binary relationship specifies the minimum number of relationship instances that an entity can participate in.
|
|
|
The partial participation constraint is also called existence dependency.
|
|
|
The cardinality ratio for a relationship specifies the average number of relationship instances that an entity can participate in.
|
Question 19 Explanation:
Cardinality: cardinality ratio for a binary relationship specifies the maximum number of relationship instances that an entity can participate in.
Participation: Participation for a binary relationship specifies the minimum number of relationship instances that an entity can participate in.
Participation: Participation for a binary relationship specifies the minimum number of relationship instances that an entity can participate in.
Correct Answer: A
Question 19 Explanation:
Cardinality: cardinality ratio for a binary relationship specifies the maximum number of relationship instances that an entity can participate in.
Participation: Participation for a binary relationship specifies the minimum number of relationship instances that an entity can participate in.
Participation: Participation for a binary relationship specifies the minimum number of relationship instances that an entity can participate in.