Kotlin Kotlin Android Development 1

Question 1

What is Jetpack Compose in Android development with Kotlin?

Accepted Answer

A modern declarative UI toolkit for building Android UIs with Kotlin

Answer

Jetpack Compose is Android's modern declarative UI framework built entirely in Kotlin that replaces XML-based layouts.

Question 2

Which annotation marks a composable function in Jetpack Compose?

Accepted Answer

@Composable

Answer

The `@Composable` annotation marks a function as a composable UI component that Compose can track and recompose when state changes.

Question 3

What is `ViewModel` used for in Android Kotlin development?

Accepted Answer

Storing and managing UI-related data that survives configuration changes

Answer

`ViewModel` holds and manages UI state in a lifecycle-aware way, surviving configuration changes like screen rotations.

Question 4

What is `LiveData` in Android?

Accepted Answer

An observable data holder that respects Android lifecycle

Answer

`LiveData` is a lifecycle-aware observable data holder that automatically updates UI observers and stops updates when the lifecycle owner is inactive.

Question 5

Which Kotlin Jetpack library provides type-safe navigation between Android screens?

Accepted Answer

Navigation Component

Answer

The Navigation Component provides a framework for in-app navigation with type-safe argument passing and back stack management.

Kotlin Practice Test

Kotlin Practice Test

Kotlin Kotlin Android Development 1