An autonomous homogenous environment is which of the following?

Solution (By Examveda Team)

An autonomous homogeneous environment in a distributed database system refers to a scenario where the same Database Management System (DBMS) is installed at each node, and each DBMS operates independently without central coordination.

Option A: The same DBMS is at each node and each DBMS works independently.
In this configuration, every node in the distributed system runs the same type of DBMS software, such as Oracle, MySQL, or PostgreSQL. Each node manages its own local database independently, without relying on a central coordinating authority. This approach offers simplicity in management and administration, as there is no need for complex coordination mechanisms between nodes. However, it may result in data redundancy and inconsistency if proper synchronization mechanisms are not in place.

Option B: The same DBMS is at each node and a central DBMS coordinates database access.
In this scenario, although the same DBMS is installed at each node, a central DBMS acts as a coordinator for database access. The central DBMS manages tasks such as query routing, data distribution, and transaction coordination across the distributed system. While this approach centralizes control and facilitates coordination, it may introduce single points of failure and scalability challenges.

Option C: A different DBMS is at each node and each DBMS works independently.
In a heterogeneous environment, different types of DBMS software are installed at different nodes in the distributed system. Each DBMS operates autonomously, managing its own local database without coordination with other nodes. While this approach offers flexibility in choosing DBMS software based on specific requirements, it can complicate interoperability and data integration between heterogeneous systems.

Option D: A different DBMS is at each node and a central DBMS coordinates database access.
This option describes a mixed environment where different DBMS software is installed at each node, and a central DBMS orchestrates database access and coordination. While this approach allows for leveraging the strengths of various DBMS platforms, it also introduces complexity in managing heterogeneous systems and requires additional integration efforts.

Therefore, in the context of an autonomous homogeneous environment in a distributed database system, the correct option is The same DBMS is at each node and each DBMS works independently (Option A).