React Native Future: New Architecture u0026 Fabric Quiz Quiz

Explore the advancements in the new React Native architecture and Fabric renderer with this focused quiz. Enhance your understanding of key features, modularization, and performance improvements brought by these technologies.

1. React Native's New Architecture Key Component

   Which component is central to React Native's new architecture for managing communication between JavaScript and native code?

   1. API Gateway Connector
   2. XML Bridge
   3. Prop Loader
   4. JSI (JavaScript Interface)

   Explanation: JSI (JavaScript Interface) is essential for the communication between JavaScript and native modules in the new architecture. API Gateway Connector is not a standard part of this framework. Prop Loader and XML Bridge do not play a central role in managing this communication, making them incorrect options.

2. Purpose of Fabric in React Native

   What is the main goal of the Fabric renderer in the updated React Native architecture?

   1. Converting Java code to JavaScript
   2. Syncing user data with the cloud
   3. Improving the performance and flexibility of the UI layer
   4. Compressing images at runtime

   Explanation: Fabric is designed to enhance the performance and flexibility of the UI rendering process. Converting Java code or compressing images is not the focus of Fabric. Syncing user data pertains to storage and networking concerns, not UI rendering.

3. Hermes and Its Role

   In the context of React Native's modernization, what is the purpose of integrating Hermes?

   1. Generating cryptographic keys
   2. Storing layout files locally
   3. Optimizing JavaScript execution for mobile
   4. Detecting memory leaks in CSS

   Explanation: Hermes is a lightweight JavaScript engine aiming to make JavaScript run more efficiently on mobile devices. Storing layout files, detecting memory leaks in CSS, or generating security keys are not the goals of integrating a JavaScript engine in this context.

4. Difference Between Bridge and JSI

   How does JSI differ from the legacy Bridge in React Native’s architecture?

   1. JSI compiles JSX to XML
   2. JSI allows direct method calls without serialization overhead
   3. JSI replaces CSS for styling
   4. JSI sends HTTP requests faster

   Explanation: JSI eliminates the need for heavy serialization by enabling direct calls between JavaScript and native code. Sending HTTP requests, compiling JSX, or replacing style approaches are not part of JSI’s function, so the other options are incorrect.

5. TurboModules Feature

   Which improvement do TurboModules introduce in React Native’s new architecture?

   1. Offline push notification support
   2. Embedded SVG support
   3. Automatic color theme generation
   4. Faster access to native modules on demand

   Explanation: TurboModules allows modules to be initialized only when needed, boosting efficiency and speed. Adding new color themes, push notifications, or supporting SVG natively are unrelated to TurboModules’ primary enhancement.

6. Concurrent Rendering in Fabric

   Why is concurrent rendering significant in Fabric for React Native apps?

   1. It blocks user input during rendering
   2. It lets the UI remain responsive while updating components
   3. It creates separate CSS files for each component
   4. It ensures automatic font size scaling

   Explanation: Concurrent rendering allows updates to happen without blocking user interactions, maintaining a responsive UI. Fabric does not manage font sizes, CSS files, or intentionally block user input, so these options do not apply.

7. Enabling the New Architecture

   What is generally required to enable the new architecture in an existing React Native project?

   1. Changing build configurations and updating dependencies
   2. Deleting the main app file
   3. Enabling airplane mode on the device
   4. Switching from JavaScript to Perl

   Explanation: To enable the new architecture, developers adjust build settings and dependencies. Deleting app files or switching programming languages would break the project, and device airplane mode has no effect here.

8. Benefits of Modularization

   What advantage does modularization bring to React Native's updated system with TurboModules?

   1. Easier maintenance and improved code reusability
   2. Automatic screen recording during debugging
   3. Making all APIs synchronous only
   4. Turning all components into static images

   Explanation: Modularization helps keep the codebase maintainable and allows modules to be reused easily. It does not provide features like screen recording, enforce synchronous APIs only, or transform components into images.

9. Fabric’s Effect on Legacy View Managers

   How does adopting Fabric influence the use of legacy view managers in a React Native application?

   1. It replaces them with a more modern layout system
   2. It requires each manager to use XML files exclusively
   3. It removes the need for event handling in components
   4. It stops all animations in the app

   Explanation: Adopting Fabric updates how UI components are managed, moving toward a contemporary layout approach. It does not mandate XML, strip event handling, or affect animations in the app.

10. Impacts on Cross-Platform Consistency

    Which result is expected from adopting the new React Native architecture regarding cross-platform app consistency?

    1. Forcing single-language development
    2. Elimination of screen transitions
    3. Mandatory use of desktop layouts
    4. More consistent UI behavior across Android and iOS

    Explanation: The new architecture, including Fabric, aims for uniform UI experiences across platforms. It does not restrict layouts to desktops, remove transitions, or demand all code be in one language.