Domain layer classes should ____.Question 4Select one:a.prepare persistent classes for storage to the databaseb.start up and shut down the systemc.edit and validate input datad.establish and maintain connections to the database
Question
Domain layer classes should ____.Question 4Select one:a.prepare persistent classes for storage to the databaseb.start up and shut down the systemc.edit and validate input datad.establish and maintain connections to the database
Solution
The domain layer classes should c. edit and validate input data.
The domain layer, also known as the business layer, is responsible for representing real-world business concepts and rules. It should contain all the business logic and validation rules. Therefore, it should edit and validate input data to ensure it adheres to the business rules before it is used within the application or stored in the database.
The other options are typically responsibilities of other layers in a software application. For example, preparing persistent classes for storage to the database and establishing and maintaining connections to the database are usually responsibilities of the data access layer. Starting up and shutting down the system is typically a function of the system or application layer.
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