Question

In ________ Data Model, the data is stored in the form of linked records, organized into a tree-like structure.

• A. Network
• B. Relational
• C. Fictional
• D. Hierarchical

Hint:

In a Hierarchical Data Model, records are stored in a tree-like structure, where each record is linked to a parent and may have child records.

Answer 1

The Correct Option is D

The question asks about a data model where data is organized in a tree-like structure using linked records. This description matches the characteristics of the Hierarchical Data Model. Let's discuss why this is the correct choice and eliminate the other options.

1. Hierarchical Data Model: In this model, data is organized into a tree-like structure where each record has a single parent and possibly many children. This hierarchy resembles an organizational chart, making it ideal for representing hierarchical structures like organizational data, file systems, etc. This tree-based storage allows straightforward navigation from a parent to a child. Given this description, the Hierarchical data model fits perfectly with the question's requirements.
2. Network Data Model: This model is similar to the hierarchical model but allows many-to-many relationships, meaning records can have multiple parent and child records. It uses a graph structure instead of a strict tree structure, providing more flexibility in accessing related data. This structure does not fit the scenario described in the question precisely, as it focuses on a more complex relationship structure.
3. Relational Data Model: In this model, data is stored in tables (relations) with rows and columns. It focuses on tabular representation and supports operations like selection, projection, and join. The structure is different from the tree-like organization described in the question. The relational model does not inherently provide a hierarchy unless explicitly modeled with attributes.
4. Fictional Data Model: This term is not standard in information technology or data management. It doesn't relate to any known data organization method and hence isn't applicable here.

Based on the explanations above, the correct answer is the Hierarchical Data Model, as it uniquely stores data in a tree-like structure using linked records, perfectly matching the question's description.