Question

In which model data is represented using records and pointers?

Answer 1

Before we begin out discussion of pointers, it is important to understand exactly what a pointer represents and how it is implemented in object databases. In pre-relational databases, each record in the database had a distinct address. These addresses were the numbers that corresponded to a physical database block. Also included in the address was the ?offset? or displacement of the target record into the block. For example, an address of 665:2 would refer to the second record in database block number 665. Once defined, these addresses could be stored inside other records, essentially allowing one record to point to another record. These pointers became the foundation of establishing relationships between entities in pre-relational times.

Answer 2

Network model data is represented using records and pointers.

Explanation:

• Providing a shape to a data is considered as a data model. It is of three types that include Object-based, Physical and Record models. The record model has subdivisions of 3- Relation, hierarchical and network.
• The network model represents data using pointers and records. In this model, the data has a series of records and the relationship among them is connected through links.
• These links are referred to as pointers. Graphs are used in representing the records of the model.

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