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24 interview questionsfor developers (2026)

Test your developer skills before an interview with 24 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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24 questions
Easy
19 votes2258 runs0 comment

List the different build modes in Flutter

Mobile developer
build
modes
Clément Devos (W3D Team)at Jan 4, 2022
Easy
12 votes2311 runs
7 comments

What is Dash?

Mobile developer
dart
flutter
Clément Devos (W3D Team)at Jan 4, 2022
Easy
11 votes2233 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
Easy
10 votes2038 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
Expert
9 votes2133 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 votes2028 runs0 comment

How to communicate with Android/ iOS code with Flutter?

Mobile developer
flutter
android
ios
Clément Devos (W3D Team)at Jan 4, 2022
Easy
7 votes2172 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 votes2051 runs0 comment

What are the different types of Dart Streams?

Mobile developer
dart
streams
Clément Devos (W3D Team)at Jan 4, 2022
Hard
5 votes1993 runs0 comment

What are Dart Isolates?

Mobile developer
dart
isolates
Clément Devos (W3D Team)at Jan 4, 2022
Hard
5 votes1959 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 votes1287 runs0 comment

What are Semantics in Flutter?

Mobile developer
flutter
widgets
Clément Devos (W3D Team)at Jan 4, 2022
Easy
4 votes1974 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
Easy
4 votes371 runs0 comment

What is a mounted Widget in Flutter?

Mobile developer
flutter
widget
state
Vincent Cotroat Nov 3, 2023
Medium
3 votes2150 runs1 comment

How to detect that the code is in release mode in Flutter?

Mobile developer
constants
release
Clément Devos (W3D Team)at Jan 4, 2022
Easy
3 votes2046 runs1 comment

What is the `??=` operator for in Flutter?

Mobile developer
operators
null
Clément Devos (W3D Team)at Aug 26, 2024
Hard
3 votes1071 runs2 comments

What are the differences between the Offstage Widget and Opacity?

Mobile developer
flutter
widget
opacity
Clément Devos (W3D Team)at Jan 4, 2022
Medium
2 votes1971 runs0 comment

What is overflow in Flutter?

Mobile developer
flutter
widgets
Clément Devos (W3D Team)at Jan 4, 2022
Easy
2 votes650 runs0 comment

What is the difference between a stateless and stateful component in Flutter?

Mobile developer
stateless
stateful
ahmedat Sep 5, 2022
Easy
1 vote1994 runs1 comment

How to intercept the Back button on Android in Flutter?

Mobile developer
flutter
widgets
Clément Devos (W3D Team)at Jan 4, 2022
Medium
1 vote1712 runs0 comment

What does the deferred keyword do in Dart?

Mobile developer
dart
imports
Clément Devos (W3D Team)at Jan 4, 2022