Commonly asked Flutter Interview Questions and Answers are given below.
1. What programming language is used in flutter?
Flutter is not a programming language. It’s a software development kit (SDK) with prewritten code, consisting of ready-to-use and customizable widgets, as well as libraries, tools, and documentation that together serve to build cross-platform apps. Flutter’s language for cross-platform development is Dart, which was also developed by Google.
2. What are the advantages of using flutter?
Cross-platform Development: Using Flutter, you can write code, manage, and run it across multiple platforms. For the developers, this saves time, money, and effort.
Reduce Code Development: Flutter’s hot reload feature allows it to offer faster performance. With it, the application gets compiled using the arm C/C++ library, making it closer to machine code and enabling it to run more quickly. The Flutter team has put lots of effort into providing a wide variety of ready-to-use widgets. Most of them are incredibly customizable, saving your time like no other framework before.
Similar to Native App Performance: Application performance is crucial for good UX. While it’s hard to tell the exact figures, it’s safe to say that Flutter application performance in most cases will be indistinguishable from the native app and even better in complex UI animation scenarios.
Good Community Support: Developers can ask questions about issues and get answers quickly.
3. What is Flutter?
Flutter is a UI toolkit for creating fast, beautiful, natively compiled mobile applications with one programming language and a single codebase. It is an open-source development framework developed by Google. Generally, Flutter is not a language; it is an SDK. Flutter apps use the Dart programming language for creating an app. The first alpha version of Flutter was released in May 2017.
4. What are the limitations of Flutter?
Flutter has the following limitations:
- Third-party libraries are limited: Since Flutter is relatively new, the number of third-party libraries is small. Additionally, some widgets in Flutter are only available on one platform.
- Release size is larger: Developers get frustrated when the release size is not as expected.
- Limited complexity: Flutter’s 3D modeling, Unity integration, and game engines fall short. Therefore, most ad mobile platforms also don’t support it.
- Lack of overall support: Flutter is not so widely used yet. Even though it enjoys the attention of tech enthusiasts, it still lacks the continuous support that will come with time. Currently, the only support that Flutter receives comes from its community.
5. What are the Flutter widgets?
A Flutter app is always considered as a tree of widgets. Whenever you are going to code for building anything in Flutter, it will be inside a widget. Widgets describe how your app view should look with their current configuration and state. When you made any alteration in the code, the widget rebuilt its description by calculating the difference of previous and current widgets to determine the minimal changes for rendering in the app’s UI.
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