Question 17

Hierarchical database satisfies the need

A hierarchical database is designed to store data in a tree-like structure, where each record has one parent and can have multiple child nodes, forming subtrees. This structure aligns perfectly with the requirement of having one parent for each record.

A) Hierarchical

This option is correct because a hierarchical database organizes data into a parent-child relationship, allowing for a clear structure where each record has a single parent. This design is efficient for representing data that naturally forms hierarchies, making it ideal for the described needs.

B) Flat-file

A flat-file database stores data in a single table without relationships between records, making it unsuitable for scenarios where hierarchical structuring is required. It lacks the ability to represent parent-child relationships, thus failing to meet the specified need.

C) Cloud

A cloud database refers to a database service hosted on a cloud computing platform, which can utilize various database models but does not inherently define a hierarchical structure. Therefore, it does not specifically address the requirement for one parent per record in a subtree arrangement.

D) NoSQL

NoSQL databases encompass a variety of data models, including document, key-value, and column-family stores, but they do not specifically imply a hierarchical structure. While some NoSQL databases can represent complex relationships, they do not inherently provide the one-parent rule as required by the question.

Conclusion

The hierarchical database is the only option that directly fulfills the requirement for a structure with one parent per record and the ability to form subtrees. All other options either lack the necessary structure or do not specifically cater to the hierarchical organization of data, making them unsuitable for the described needs.