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Flutter Clean Architecture: Questions

Basic Concepts (Questions 1-8)

  1. What is Clean Architecture and why should we use it in Flutter applications?

  2. What are the main layers in Clean Architecture and what is the responsibility of each layer?

  3. What is the Dependency Rule in Clean Architecture?

  4. What are the key benefits of implementing Clean Architecture in Flutter projects?

  5. How does Clean Architecture differ from MVC and MVVM patterns?

  6. What is Separation of Concerns and how does Clean Architecture achieve it?

  7. When should you use Clean Architecture in a Flutter project and when might it be overkill?

  8. What are the main challenges when implementing Clean Architecture in Flutter?

Layers & Structure (Questions 9-16)

  1. What is the Presentation Layer and what components does it contain?

  2. What is the Domain Layer and why is it considered the core of Clean Architecture?

  3. What is the Data Layer and what are its main responsibilities?

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

  5. What is the difference between Models and Entities in Clean Architecture?

  6. How do you structure a Flutter project using Clean Architecture with feature-first approach?

  7. How do you structure a Flutter project using Clean Architecture with layer-first approach?

  8. What should and shouldn't be included in each layer?

Use Cases / Interactors (Questions 17-22)

  1. What is a Use Case (or Interactor) in Clean Architecture?

  2. How do you implement a Use Case in Flutter?

  3. Should a Use Case contain only one public method? Why or why not?

  4. How do you handle parameters in Use Cases?

  5. What are the naming conventions for Use Cases in Flutter?

  6. How do you compose multiple Use Cases together?

Entities (Questions 23-26)

  1. What are Entities in Clean Architecture and where do they belong?

  2. What is the difference between an Entity and a Model in Clean Architecture?

  3. Should Entities be immutable? Why or why not?

  4. How do you convert between Entities and Models?

Repository Pattern (Questions 27-32)

  1. What is the Repository Pattern in Clean Architecture?

  2. Why do we define Repository interfaces in the Domain Layer but implement them in the Data Layer?

  3. How do you implement a Repository in Flutter?

  4. How do you handle caching in Repositories?

  5. How do you handle errors in Repositories?

  6. What is the difference between Repository and Data Source?

Data Sources (Questions 33-37)

  1. What are Data Sources in Clean Architecture?

  2. What is the difference between Remote Data Source and Local Data Source?

  3. How do you implement a Remote Data Source using Dio in Flutter?

  4. How do you implement a Local Data Source using Hive or SharedPreferences?

  5. How do you implement offline-first architecture with Data Sources?

Dependency Injection (Questions 38-41)

  1. Why is Dependency Injection important in Clean Architecture?

  2. How do you implement Dependency Injection using GetIt in Flutter?

  3. What is the difference between Service Locator and Dependency Injection?

  4. How do you use the Injectable package for automatic dependency injection?

SOLID Principles (Questions 42-45)

  1. How does Clean Architecture implement the Single Responsibility Principle (SRP)?

  2. How does Clean Architecture implement the Open/Closed Principle (OCP)?

  3. How does Clean Architecture implement the Dependency Inversion Principle (DIP)?

  4. How do SOLID principles improve testability in Clean Architecture?

Error Handling (Questions 46-48)

  1. What is the difference between Failures and Exceptions in Clean Architecture?

  2. How do you use the Either type from the dartz package for error handling?

  3. How do you propagate errors across different layers in Clean Architecture?

Testing (Questions 49-50)

  1. How do you write unit tests for Use Cases in Clean Architecture?

  2. How do you mock Repositories for testing?

State Management Integration (Questions 51-55)

  1. How do you integrate BLoC with Clean Architecture?

  2. How do you integrate GetX with Clean Architecture?

  3. How do you integrate Riverpod with Clean Architecture?

  4. Where should state management logic reside in Clean Architecture?

  5. How do you handle navigation in Clean Architecture with different state management solutions?

Best Practices & Common Mistakes (Questions 56-60)

  1. What are the most common mistakes when implementing Clean Architecture in Flutter?

  2. How do you avoid over-engineering when using Clean Architecture?

  3. What are the performance considerations when using Clean Architecture?

  4. How do you handle complex business logic involving multiple entities and Use Cases?

  5. What are the best practices for organizing imports and exports in Clean Architecture?