Flutter MCQs and Answers With Explanation: Flutter is a popular open-source mobile application development framework that allows developers to create high-quality, visually appealing, and performance-driven apps for both Android and iOS platforms. Flutter has gained widespread adoption among developers due to its rich set of features, ease of use, and fast development cycle. In this article, we will present the top 30 Flutter MCQs and answers, designed to test your knowledge of Flutter and its features.
Flutter Multiple Choice Questions and Answers
These Flutter Multiple Choice Questions and Answers will cover topics such as Flutter widgets, Dart programming language, and basic Flutter concepts, and will help you improve your skills and prepare for a Flutter quiz.
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Flutter MCQs and Answers
| Name | Flutter |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 30 Flutter MCQs
1. What is Flutter?
a) A programming language
b) A mobile app development framework
c) A database management system
d) An operating system
Ans: b) A mobile app development framework
Explanation: Flutter is a mobile app development framework developed by Google that enables developers to create high-performance, high-fidelity, apps for iOS and Android, using a single codebase.
2. Which programming language is used for Flutter development?
a) Java
b) Swift
c) Dart
d) Python
Ans: c) Dart
Explanation: Flutter uses Dart programming language, which is an object-oriented programming language developed by Google. Dart is used to build both the client-side and server-side of web applications, and it is the language used by Flutter to build mobile applications.
3. What is the purpose of the Flutter Engine?
a) To compile Dart code to machine code
b) To provide a library of pre-built widgets
c) To manage the state of the application
d) To handle HTTP requests
Ans: a) To compile Dart code to machine code
Explanation: The Flutter Engine is the core of the Flutter framework. Its primary purpose is to compile Dart code into machine code that can be run on iOS and Android devices. The Flutter Engine also provides a platform-agnostic layer of abstraction that allows Flutter widgets to work seamlessly across multiple platforms.
4. What is a widget in Flutter?
a) A visual element in the user interface
b) A block of code that performs a specific task
c) A method for handling user input
d) A type of data structure
Ans: a) A visual element in the user interface
Explanation: In Flutter, a widget is a visual element in the user interface, such as a button, text input, or image. Widgets are the building blocks of a Flutter app, and they are used to create the user interface and manage user interactions.
5. What is the purpose of the runApp() function in Flutter?
a) To start the Flutter application
b) To define the layout of the user interface
c) To handle user input
d) To manage the state of the application
Ans: a) To start the Flutter application
Explanation: The runApp() function is used to start the Flutter application. It takes a widget as an argument, and that widget becomes the root of the widget tree. The widget tree is the hierarchical structure of widgets that make up the user interface of the app.
6. Which widget is used to create a button in Flutter?
a) Text
b) Image
c) IconButton
d) RaisedButton
Ans: d) RaisedButton
Explanation: The RaisedButton widget is used to create a button in Flutter. It is a material design button that has a raised appearance and responds to user interactions, such as tapping or clicking.
7. Which widget is used to create a text input field in Flutter?
a) TextField
b) Text
c) TextInput
d) InputField
Ans: a) TextField
Explanation: The TextField widget is used to create a text input field in Flutter. It is a material design text field that allows the user to enter text or numbers.
8. What is the purpose of the setState() method in Flutter?
a) To create a new widget
b) To manage the state of the application
c) To handle user input
d) To define the layout of the user interface
Ans: b) To manage the state of the application
Explanation: The setState() method is used to manage the state of the application in Flutter. It is called whenever the state of a widget needs to be updated, such as when the user interacts with the user interface. When the state of a widget changes, the Flutter framework rebuilds the widget tree to reflect the new state.
9. Which widget is used to display an image in Flutter?
a) ImageField
b) ImageWidget
c) Image
d) ImageView
Ans: c) Image
Explanation: The Image widget is used to display an image in Flutter. It supports various types of image sources, including network images, local images, and memory images.
10. What is hot reload in Flutter?
a) A feature that allows developers to see the changes they make to the code in real-time
b) A feature that automatically saves code changes as they are made
c) A feature that optimizes the performance of the app
d) A feature that provides real-time analytics for the app
Ans: a) A feature that allows developers to see the changes they make to the code in real-time
Explanation: Hot reload is a feature in Flutter that allows developers to see the changes they make to the code in real-time, without having to restart the app or lose the current state of the app. This feature helps to speed up the development process and allows developers to experiment with different features quickly.
11. What is the purpose of the MaterialApp widget in Flutter?
a) To define the layout of the user interface
b) To handle user input
c) To manage the state of the application
d) To provide a set of material design widgets
Ans: d) To provide a set of material design widgets
Explanation: The MaterialApp widget is used to provide a set of material design widgets to the app, including buttons, text fields, and icons. It also provides a consistent look and feel to the app and helps to ensure that the app follows the material design guidelines.
12. Which widget is used to create a drawer in Flutter?
a) DrawerWidget
b) DrawerLayout
c) Drawer
d) NavigationDrawer
Ans: c) Drawer
Explanation: The Drawer widget is used to create a drawer in Flutter. A drawer is a panel that slides in from the side of the screen and is used to provide additional navigation or functionality to the user.
13. Which widget is used to create a tab bar in Flutter?
a) TabBarWidget
b) TabLayout
c) TabBar
d) NavigationTabBar
Ans: c) TabBar
Explanation: The TabBar widget is used to create a tab bar in Flutter. A tab bar is a set of tabs that allow the user to switch between different views or sections of the app.
14. What is the purpose of the Navigator widget in Flutter?
a) To create a new widget
b) To manage the state of the application
c) To handle user input
d) To navigate between different screens in the app
Ans: d) To navigate between different screens in the app
Explanation: The Navigator widget is used to navigate between different screens or pages in the app. It manages a stack of routes, where each route represents a screen or page in the app.
15. Which widget is used to create a list in Flutter?
a) ListView
b) ListWidget
c) ListLayout
d) ListContainer
Ans: a) ListView
Explanation: The ListView widget is used to create a list in Flutter. It is a scrolling container that can display a large number of items in a vertical or horizontal direction.
16. What is the purpose of the FutureBuilder widget in Flutter?
a) To build a widget tree based on the state of a future
b) To handle user input
c) To create a new widget
d) To manage the state of the application
Ans: a) To build a widget tree based on the state of a future
Explanation: The FutureBuilder widget is used to build a widget tree based on the state of a future. It can display a loading indicator while the future is being resolved, and then build a widget tree based on the result of the future.
17. Which widget is used to create a button in Flutter?
a) Button
b) RaisedButton
c) FlatButton
d) All of the above
Ans: d) All of the above
Explanation: There are multiple widgets that can be used to create a button in Flutter, including Button, RaisedButton, and FlatButton. Each of these widgets provides different styling and functionality for the button.
18. Which widget is used to create a text input field in Flutter?
a) TextField
b) InputField
c) TextInput
d) TextWidget
Ans: a) TextField
Explanation: The TextField widget is used to create a text input field in Flutter. It allows the user to enter text input and provides various customization options, such as input validation and keyboard type.
19. What is the purpose of the StatelessWidget in Flutter?
a) To build a widget tree based on the state of a future
b) To manage the state of the application
c) To create a new widget
d) To build a widget tree that does not depend on any mutable state
Ans: d) To build a widget tree that does not depend on any mutable state
Explanation: The StatelessWidget in Flutter is used to build a widget tree that does not depend on any mutable state. It can be used to create widgets that do not need to be updated based on user input or any other state change.
20. What is the purpose of the StatefulWidget in Flutter?
a) To create a new widget
b) To manage the state of the application
c) To build a widget tree based on the state of a future
d) To build a widget tree that does not depend on any mutable state
Ans: b) To manage the state of the application
Explanation: The StatefulWidget in Flutter is used to manage the state of the application. It can be used to create widgets that need to be updated based on user input or any other state change.
21. Which widget is used to create a progress indicator in Flutter?
a) ProgressIndicator
b) CircularProgress
c) LinearProgressIndicator
d) All of the above
Ans: d) All of the above
Explanation: There are multiple widgets that can be used to create a progress indicator in Flutter, including ProgressIndicator, CircularProgress, and LinearProgressIndicator. Each of these widgets provides different styling and functionality for the progress indicator.
22. Which widget is used to create a switch in Flutter?
a) ToggleSwitch
b) Switch
c) OnOffSwitch
d) All of the above
Ans: b) Switch
23. Explanation: The Switch widget is used to create a switch in Flutter. It allows the user to toggle between two states and provides various customization options, such as the switch color and label.
What is the purpose of the Container widget in Flutter?
a) To provide a set of material design widgets
b) To manage the state of the application
c) To create a new widget
d) To provide a flexible container for layout and styling
Ans: d) To provide a flexible container for layout and styling
Explanation: The Container widget in Flutter is used to provide a flexible container for layout and styling. It can be used to add padding, margins, and borders to other widgets, as well as to apply background and foreground colors.
24. Which widget is used to create a grid in Flutter?
a) GridView
b) GridWidget
c) GridLayout
d) GridContainer
Ans: a) GridView
Explanation: The GridView widget is used to create a grid in Flutter. It allows the user to display a collection of widgets in a grid layout and provides various customization options.
25. What is the purpose of the ListView widget in Flutter?
a) To display a collection of widgets in a scrollable list
b) To create a new widget
c) To provide a set of material design widgets
d) To provide a flexible container for layout and styling
Ans: a) To display a collection of widgets in a scrollable list
Explanation: The ListView widget in Flutter is used to display a collection of widgets in a scrollable list. It can be used to display a large number of items efficiently and provides various customization options, such as scrolling behavior and item selection.
26. Which widget is used to create a tab bar in Flutter?
a) TabBar
b) TabWidget
c) TabContainer
d) TabView
Ans: a) TabBar
Explanation: The TabBar widget is used to create a tab bar in Flutter. It allows the user to switch between different tabs and provides various customization options, such as the tab indicator and label.
27. What is the purpose of the Scaffold widget in Flutter?
a) To create a new widget
b) To provide a set of material design widgets
c) To provide a layout for the application’s pages
d) To manage the state of the application
Ans: c) To provide a layout for the application’s pages
Explanation: The Scaffold widget in Flutter is used to provide a layout for the application’s pages. It can be used to add various material design elements, such as app bars, drawers, and bottom navigation, to the application’s pages.
28. Which widget is used to create a dropdown button in Flutter?
a) DropdownButton
b) DropdownWidget
c) DropButton
d) All of the above
Ans: a) DropdownButton
Explanation: The DropdownButton widget is used to create a dropdown button in Flutter. It allows the user to select from a list of options and provides various customization options, such as the dropdown button icon and menu items.
29. What is the purpose of the FutureBuilder widget in Flutter?
a) To build a widget tree based on the state of a future
b) To create a new widget
c) To manage the state of the application
d) To provide a set of material design widgets
Ans: a) To build a widget tree based on the state of a future
Explanation: The FutureBuilder widget in Flutter is used to build a widget tree based on the state of a future. It can be used to display a loading indicator while the future is being resolved, and then build a widget tree based on the result of the future.
30. What is the purpose of the InkWell widget in Flutter?
a) To create a new widget
b) To provide a set of material design widgets
c) To provide a visual feedback when the user taps on a widget
d) To manage the state of the application
Ans: c) To provide a visual feedback when the user taps on a widget
Explanation: The InkWell widget in Flutter is used to provide a visual feedback when the user taps on a widget. It can be used to add ripple effects and other visual feedback to widgets that respond to user input, such as buttons and list items.
The Flutter MCQs and Answers With Explanation provide a comprehensive overview of Flutter and its features. These MCQs will aid developers in enhancing their knowledge of Flutter and preparing for Flutter quizzes. To acquire additional knowledge, please follow us at freshersnow.com.