Explanation: It is used to define, deploy, execute, monitor and maintain the variety and complexity of decision logic that is used by operational systems within an organization or enterprise. 9. Use of a supertype/subtype relationship is necessary when which of the following exists?
A. An instance of a subtype participates in a relationship that is unique to that subtype
B. An instance of a subtype participates in a relationship that is the same as the other subtypes
C. Attributes apply to all of the instances of an entity type
D. No attributes apply to any of the instances of an entity type
Answer:A
Explanation: It is used to define, deploy, execute, monitor and maintain the variety and complexity of decision logic that is used by operational systems within an organization or enterprise. 9. Use of a supertype/subtype relationship is necessary when which of the following exists?
A. An instance of a subtype participates in a relationship that is unique to that subtype B. An instance of a subtype participates in a relationship that is the same as the other subtypes C. Attributes apply to all of the instances of an entity type D. No attributes apply to any of the instances of an entity type
Explanation: Super-types and sub-types show hierarchy in the structure; graphs and trees show hierarchy in the data.