Question

Select the correct statement below about database services or database instances:

A. Database services are logical abstractions for managing workloads in a database.
B. An instance of the cloud database operates as a service that handles all application requests to work with the data in any of the databases managed by that instance.
C. The database service instance is the target of the connection requests from applications.

Answer 1

Database services are logical abstractions for managing workloads in a database. An instance of the cloud database operates as a service for handling application requests. The database service instance is the target for connection requests from applications.

Step-by-step explanation:

The correct statement about database services or database instances is option A: Database services are logical abstractions for managing workloads in a database. A database service provides a high-level interface for managing and accessing data, allowing users to interact with the database without needing to understand the underlying infrastructure.

An instance of a cloud database, on the other hand, refers to the physical or virtual environment where databases are hosted. It operates as a service, handling all application requests to work with the data in any of the databases managed by that instance. This allows for efficient resource allocation and scalability.

The database service instance serves as the target for connection requests from applications. It acts as the endpoint for applications to connect and interact with the databases hosted within the instance.1

Answer 2

The correct statement about database services is that they are logical abstractions for managing workloads in a database. A database service is different from a database instance, which refers to the actual software and memory structures interacting with database files.

Step-by-step explanation:

The question pertains to the concepts of database services and database instances within the context of databases, particularly in cloud computing environments. The correct statement among the options provided is:

A. Database services are logical abstractions for managing workloads in a database.

This statement accurately describes database services as abstractions that facilitate workload management without tying these services to any specific instance. Such services may include capabilities like load balancing, resource allocation, and user management. In contrast, a database instance typically refers to the actual set of software and memory structure that interacts with the database files. It is important to note that:

B. An instance of the cloud database can indeed operate as a service, but it does not necessarily handle all application requests by itself for any of the databases managed by the instance. Other components and services might be involved in request handling.

C. The database service instance is indeed a target for connection requests from applications, but the use of 'service instance' in this context might be misleading as the term 'instance' is usually specifically for the actual operational component of the database.