Service Layer

What is the main purpose of the Service Layer in backend architecture?. To handle user input and generate HTTP responses. To contain and manage the application’s business logic. To store and retrieve data directly from the database.

The Service Layer should be responsible for rendering views or formatting HTTP responses. True. False.

Which description best matches the Service Layer?. A layer that centralizes business operations and coordinates workflows. A layer that defines database schemas. A layer that handles routing and HTTP endpoints.

One of the goals of the Service Layer is to reduce duplication of business logic across multiple controllers. True. False.

What does the Service Layer primarily return to the Presentation Layer?. Raw SQL queries. HTML templates. Processed data or results of business operations.

Which of the following best explains the relationship between the Service Layer and the Data Access Layer?. The Service Layer calls repositories to get or update data. The Service Layer stores the database credentials. The Service Layer is placed below the Data Access Layer.

The Service Layer should depend on the Presentation Layer. True. False.

Which of the following is a primary responsibility of the Service Layer?. Managing HTTP status codes. Orchestrating business logic and workflows. Defining database tables.

The Service Layer is responsible for coordinating multiple repositories or data sources during a business operation. True. False.

What role does the Service Layer play in enforcing business rules?. It applies core rules and constraints that are essential to the domain. It only validates user input. It only triggers database transactions.

The Service Layer should handle logging, caching, and infrastructure concerns directly. True. False.

Which of the following tasks is the Service Layer responsible for?. Transforming raw DB entities into business-friendly objects or DTOs. Performing index optimization on the database. Setting up routing logic.

Which statement best describes the Service Layer as a mediator?. It mediates between the controller and the database layer. It mediates between different frontend UI components. It mediates between CSS and HTML.

A core responsibility of the Service Layer is ensuring consistent business outcomes across different entry points (API, CLI, cron jobs, events). True. False.