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331 interview questionsfor Mobile developer (2026)

Test your technical skills before an interview of Mobile developer with 331 corrected questions. Beginner, Intermediate or Expert level.

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331 questions
Easy
19 votes2224 runs0 comment

List the different build modes in Flutter

Mobile developer
build
modes
Clément Devos (W3D Team)at Jan 4, 2022
Easy
11 votes2200 runs0 comment

Explain the difference between the `main` and `runApp` methods in Flutter.

Mobile developer
flutter
main
runApp
Clément Devos (W3D Team)at Jan 4, 2022
Hard
11 votes826 runs0 comment

How to flatten a list of lists in Kotlin

Mobile developer
list
map
Anonymous authorat Jan 18, 2022
Medium
10 votes2275 runs
7 comments

What is Dash?

Mobile developer
dart
flutter
Clément Devos (W3D Team)at Jan 4, 2022
Easy
10 votes2010 runs0 comment

Explain the difference between the *final* and *const* keywords in Flutter.

Mobile developer
flutter
const
final
Clément Devos (W3D Team)at Jan 4, 2022
Hard
9 votes2104 runs1 comment

What is the BuildContext used for in Flutter?

Mobile developer
flutter
widgets
buildcontext
Clément Devos (W3D Team)at Jan 4, 2022
Hard
8 votes2002 runs0 comment

How to communicate with Android/ iOS code with Flutter?

Mobile developer
flutter
android
ios
Clément Devos (W3D Team)at Jan 4, 2022
Hard
8 votes592 runs2 comments

How flexbox works in React Native?

Mobile developer
flexbox
react native
Davidat Sep 6, 2023
Easy
6 votes2142 runs0 comment

Explain the difference between a Hot Restart and a Hot Reload in Flutter.

Mobile developer
flutter
hot reload
hot restart
Clément Devos (W3D Team)at Jan 4, 2022
Easy
6 votes2025 runs0 comment

What are the different types of Dart Streams?

Mobile developer
dart
streams
Clément Devos (W3D Team)at Jan 4, 2022
Easy
6 votes750 runs1 comment

Write a function that returns the maximum of two integers in Kotlin

Mobile developer
functions
kotlin
Anonymous authorat Jan 18, 2022
Medium
5 votes1967 runs0 comment

What are Dart Isolates?

Mobile developer
dart
isolates
Clément Devos (W3D Team)at Jan 4, 2022
Hard
5 votes1933 runs0 comment

How to make a Text widget display a double yellow highlight in Flutter

Mobile developer
flutter
theme
Clément Devos (W3D Team)at Jan 4, 2022
Hard
5 votes1262 runs0 comment

What are Semantics in Flutter?

Mobile developer
flutter
widgets
Clément Devos (W3D Team)at Jan 4, 2022
Easy
5 votes751 runs0 comment

Kotlin: Compile the following code and see the error.

Mobile developer
kotlin
null
Anonymous authorat Jan 18, 2022
Expert
5 votes511 runs1 comment

How to define a component in React Native?

Mobile developer
react
react-native
components
Davidat Sep 6, 2023
Easy
5 votes431 runs2 comments

What is the purpose of a RecyclerView in Android?

Mobile developer
list
adapter
Nicolas Laurentat Nov 29, 2021
Easy
4 votes1947 runs0 comment

What is the difference between an Exception and an Error in Flutter?

Mobile developer
flutter
exceptions
Clément Devos (W3D Team)at Jan 4, 2022
Medium
4 votes624 runs0 comment

Create a data class with a vip property implementing the Human interface

Mobile developer
kotlin
data class
interfaces
Anonymous authorat Jan 18, 2022
Hard
4 votes488 runs
1 comment

Write a React Native animation that spins an image.

Mobile developer
react native
animation
component
Victor Sabatierat Dec 2, 2021
Mobile developer tests