What type of database model organizes data in a tree-like structure?

What type of database model organizes data in a tree-like structure?

• A. Relational model
• B. Network model
• C. Hierarchical model
• D. Object-oriented model

Answer: (C)

The hierarchical model organizes data in a tree-like structure, where each record has a single parent and potentially multiple children. This structure allows for a clear and easy navigation through the data, making it intuitive to understand relationships between different elements. Each node represents a data record, and the connections represent the relationships between them, with the root node acting as the topmost parent. This model is particularly efficient for representing data that naturally forms a hierarchy, such as organizational charts or file systems. In contrast, the relational model uses a table-based structure where data is organized into rows and columns, allowing for more flexible and complex queries. The network model, while also using connections between nodes, allows for more complex relationships than just parent-child, resembling a graph structure. The object-oriented model organizes data as objects, which may encapsulate both properties and behaviors, presenting another distinct way to manage data that does not conform to a strict hierarchical arrangement.

The hierarchical model organizes data in a tree-like structure, where each record has a single parent and potentially multiple children. This structure allows for a clear and easy navigation through the data, making it intuitive to understand relationships between different elements. Each node represents a data record, and the connections represent the relationships between them, with the root node acting as the topmost parent. This model is particularly efficient for representing data that naturally forms a hierarchy, such as organizational charts or file systems.

In contrast, the relational model uses a table-based structure where data is organized into rows and columns, allowing for more flexible and complex queries. The network model, while also using connections between nodes, allows for more complex relationships than just parent-child, resembling a graph structure. The object-oriented model organizes data as objects, which may encapsulate both properties and behaviors, presenting another distinct way to manage data that does not conform to a strict hierarchical arrangement.