Top Flutter Interview Quiz Quiz

Test your understanding of Flutter fundamentals and key interview concepts with this easy multiple-choice quiz. Ideal for anyone preparing for Flutter job interviews or wanting to review core Flutter topics, widgets, and framework features.

1. Flutter Basics

   Which programming language is primarily used to build applications with Flutter?

   1. Java
   2. Kotlin
   3. Swift
   4. Dart

2. Widget Types

   In Flutter, which type of widget should you use when your UI does not need to change its state during runtime?

   1. StatefulWidget
   2. InheritedWidget
   3. AnimatedWidget
   4. StatelessWidget

3. Hot Reload vs Hot Restart

   What is the main advantage of using hot reload in Flutter during development?

   1. It clears the build cache
   2. It quickly updates the UI without losing the current app state
   3. It recompiles the entire project from scratch
   4. It resets all application state

4. BuildContext Purpose

   What is BuildContext generally used for in a Flutter widget's build method?

   1. To define the application's entry point
   2. To access the widget's position in the widget tree and interact with themes or navigation
   3. To store user authentication data
   4. To specify the main asset directory

5. Navigation Methods

   When using Navigator.pushReplacement, what happens to the current screen?

   1. It becomes a background service
   2. It is removed from the stack and replaced by a new screen
   3. It is hidden temporarily and can be accessed again
   4. It opens an external web browser

6. Futures and Async Programming

   Which widget is used in Flutter to build UI based on the result of a Future, such as loading data asynchronously?

   1. ListView
   2. FutureBuilder
   3. Container
   4. AppBar

7. Understanding setState()

   How does calling setState() affect a StatefulWidget in Flutter?

   1. It updates the widget’s internal state and triggers a rebuild of the UI
   2. It changes the app's theme
   3. It destroys the widget completely
   4. It pauses all animations

8. Hot Reload Usage

   Which scenario is most appropriate for using hot restart instead of hot reload?

   1. Changing the text in a Text widget
   2. Modifying the build method parameters
   3. Updating main() or clearing an app’s full state
   4. Adjusting padding in a widget

9. Widget Trees

   Which statement best describes the widget tree in Flutter?

   1. A type of state management system
   2. A collection of database queries
   3. A hierarchical structure describing the UI elements arranged as parent and child widgets
   4. A static HTML document

10. Single Codebase Concept

    What does it mean that Flutter supports a single codebase?

    1. It only supports stateless widgets
    2. It can only build apps for one platform at a time
    3. The same code can be used to build apps for multiple platforms like Android, iOS, and web
    4. Each screen requires a separate code file