Flutter handles differences in screen size and resolution by using responsive UI design principles and layout widgets. Developers can create flexible and adaptive user interfaces that automatically adjust to various screen sizes and resolutions. This approach ensures a consistent and visually appealing experience across different devices. Understanding how to design responsive UIs is essential for delivering a seamless user experience in Flutter applications on diverse platforms.

The 'ByteBuffer' class in Flutter is utilized for efficient byte-level operations on files. It represents a sequence of bytes and provides methods for reading and writing data at the byte level. Flutter developers often use 'ByteBuffer' when working with binary data or performing low-level file operations that require manipulation at the byte level. Understanding how to use 'ByteBuffer' is essential for developers handling file-related tasks that involve byte-level operations.

The primary purpose of unit testing in Flutter is to test individual components (units) in isolation. Unit tests focus on verifying that each function or method works as intended. By isolating components, developers can catch and fix bugs early in the development process. This helps ensure the reliability of each unit and contributes to the overall stability and quality of the Flutter app.

Handling different screen sizes in Flutter involves using the LayoutBuilder widget along with breakpoints. By defining conditions based on the available screen width, developers can create responsive layouts that adapt to various screen sizes. This approach allows for a flexible and dynamic UI that works well across different devices. Understanding responsive layout strategies is crucial for delivering a consistent user experience in Flutter applications.

To specify a dependency from a hosted source in the pubspec.yaml file, you must include the package name and the source keyword followed by the hosted source URL. This allows your Flutter project to fetch the package from the specified source. Understanding the correct syntax in the pubspec.yaml file is crucial for managing dependencies effectively in a Flutter project.

To print output to the console in Dart, you use the 'print()' method. It accepts a single argument (the value to be printed) and displays it in the console. This is a common way to debug and display information in Dart.

Integrating a native SDK in Flutter involves key steps such as identifying the SDK's platform compatibility, setting up platform channels, and handling data conversion between Dart and native code. This ensures effective communication between Flutter and the native SDK. Challenges may include dealing with platform-specific nuances and ensuring smooth data exchange. The integration process requires a good understanding of Flutter platform channels and the native SDK's requirements.

In Dart, the 'toFuture()' method can be used to convert a Stream into a Future. This method allows you to transform a stream's asynchronous events into a single future that completes with the latest event of the stream. Understanding how to work with streams and futures is essential for handling asynchronous programming efficiently in Dart, especially in scenarios where you need to await a single value from a stream.

Blue-green deployment is a strategy where two environments (blue and green) run simultaneously, allowing for the seamless transition between versions. This approach minimizes downtime and risk by ensuring that both the old and new versions are operational during deployment. It provides a rollback mechanism in case of issues. Understanding deployment strategies is crucial for maintaining application availability and reliability in production environments.

To address lag during scrolling in a Flutter app, optimizing the scroll performance is crucial. One effective technique is to employ the physics property with a custom ScrollController. By adjusting the physics, developers can fine-tune the scrolling behavior. Additionally, using a custom ScrollController allows for more control over the scroll events, enabling optimizations such as lazy loading or item caching. This approach can significantly enhance the scrolling experience in a Flutter application.