Which of the following establishes a top-to-bottom relationship among the items?
A. Relational schema
B. Network schema
C. Hierarchical schema
D. All of the mentioned
Answer:C
Which of the following establishes a top-to-bottom relationship among the items?
A. Relational schema B. Network schema C. Hierarchical schema D. All of the mentioned
Explanation: A data model in which the data is structured into a tree-like structure is known as a hierarchical model. The structure allows information to be represented using parent-child relationships.