Clean Architecture layers in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the layer responsible for business rules in Clean Architecture.

Android Kotlin

class [1] {
  fun execute() {
    // Business logic here
  }
}

Drag options to blanks, or click blank then click option'

AUILayer

BDataLayer

CDomainLayer

DPresentationLayer

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing DomainLayer with DataLayer or PresentationLayer.

The DomainLayer contains the business rules and logic in Clean Architecture.

2fill in blank

medium

Complete the code to declare the layer that handles UI and user interaction.

Android Kotlin

class [1] {
  fun show() {
    // Display UI
  }
}

Drag options to blanks, or click blank then click option'

ADomainLayer

BPresentationLayer

CDataLayer

DBusinessLayer

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing PresentationLayer with DomainLayer or DataLayer.

The PresentationLayer manages UI and user interaction in Clean Architecture.

3fill in blank

hard

Fix the error in the code by selecting the correct layer name for data access.

Android Kotlin

class [1] {
  fun fetchData() {
    // Access database or network
  }
}

Drag options to blanks, or click blank then click option'

ADataLayer

BDomainLayer

CUILayer

DPresentationLayer

Attempts:

3 left

💡 Hint

Common Mistakes

Using DomainLayer or PresentationLayer for data access.

The DataLayer is responsible for data access like databases or network calls.

4fill in blank

hard

Fill both blanks to complete the interface and its implementation for the DataLayer.

Android Kotlin

interface [1] {
  fun getData(): String
}

class [2] : [1] {
  override fun getData() = "Data"
}

Drag options to blanks, or click blank then click option'

ARepository

BDataSource

CRepositoryImpl

DDataLayer

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing interface and implementation names.

The Repository interface defines data operations, and RepositoryImpl implements it in the DataLayer.

5fill in blank

hard

Fill all three blanks to complete the use case class calling the repository method.

Android Kotlin

class [1](private val [2]: [3]) {
  fun execute() = [2].getData()
}

Drag options to blanks, or click blank then click option'

AGetUserData

Brepository

CRepository

DDataSource

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong class or variable names.

The use case GetUserData calls the repository of type Repository to get data.