In a Hierarchical database, a hashing function is used to locate the _______

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UGC NET Computer Science (Paper 2) July 2018 Paper
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  1. Collision
  2. Root
  3. Foreign Key
  4. Records

Answer (Detailed Solution Below)

Option 2 : Root
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UGC NET Paper 1: Held on 21st August 2024 Shift 1
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Concept:

A data model is a collection of concepts that can be used to describe the structure of a database and provides the necessary means to achieve the abstraction.  Types of data model are : hierarchical data model, network data model and relational model.

Explanation:

Hierarchical data model: In this data model, data is organized in the form of tree in which nodes represent the records and branches of tree represent the fields. Parent node or root of three have connection with its child nodes.

During search operation in this data model, search takes place from root and then moves to the children to reach the specific record. That means, searching always starts from root. If we use hashing function for the search operation than hashing function will locate the root of the model.

Diagram for hierarchical database model:

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