Clean Architecture layers in Flutter - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the main purpose of the Presentation Layer in Clean Architecture?

The Presentation Layer handles the user interface and user interactions. It shows data to the user and sends user actions to the next layer.

beginner

Define the role of the Domain Layer in Clean Architecture.

The Domain Layer contains the business rules and logic. It is independent of UI or data sources and focuses on what the app does.

beginner

What does the Data Layer do in Clean Architecture?

The Data Layer manages data sources like databases, APIs, or local storage. It fetches and saves data and converts it to a form the Domain Layer understands.

intermediate

Why is it important that the Domain Layer is independent of other layers?

Independence means business rules don’t depend on UI or data details. This makes the app easier to test, maintain, and change without breaking core logic.

intermediate

How do the layers in Clean Architecture communicate with each other?

Layers communicate through interfaces or abstractions. The Presentation Layer calls the Domain Layer, which calls the Data Layer. This keeps layers separate and flexible.

Which layer in Clean Architecture is responsible for business rules?

A Data Layer

B Presentation Layer

C Domain Layer

D UI Layer

The Domain Layer contains the business rules and logic.

What does the Data Layer mainly handle?

A Business logic

B Data sources like APIs and databases

C User interface

D Navigation

The Data Layer manages data sources such as APIs and databases.

Why should the Domain Layer be independent?

A To allow easy testing and maintenance

B To handle user input

C To speed up data fetching

D To make UI look better

Independence allows easy testing and maintenance of business rules.

Which layer directly interacts with the user?

A Presentation Layer

B Domain Layer

C Data Layer

D Repository Layer

The Presentation Layer handles user interface and interactions.

How do layers communicate in Clean Architecture?

A Directly accessing each other's data

B By sharing UI components

C Using global variables

D Through interfaces or abstractions

Layers communicate through interfaces or abstractions to keep separation.

Explain the three main layers of Clean Architecture and their responsibilities.

Think about what each layer does in a simple app.

Why is it beneficial to keep the Domain Layer independent from the Presentation and Data Layers?

Consider how changes in UI or data sources should not break core logic.