Skip to main content

GetX State Management Interview Questions

GetX State Management Interview Questions

GetX State Management Interview Questions and Answers

1. What is GetX in Flutter?

GetX is a lightweight and efficient state management solution for Flutter that provides reactive state management, dependency injection, and routing.

2. How does GetX handle state management?

GetX supports reactive state management using Obx and simple state management using GetBuilder.

3. What is the difference between Obx and GetBuilder?

Obx is for automatic UI updates with .obs variables, while GetBuilder requires calling update() manually.

class CounterController extends GetxController {
  var count = 0.obs; // Reactive state
  void increment() => count++;
}

4. What are GetxController lifecycle methods?

Key methods:

  • onInit() - Called when the controller is created.
  • onReady() - Called after widget is built.
  • onClose() - Called when the controller is removed.

5. How do you use dependency injection in GetX?

Get.put(CounterController()); // Registers controller immediately
Get.lazyPut(() => CounterController()); // Lazy initialization

6. How do you navigate between screens in GetX?

Use Get.to(), Get.off(), or Get.offAll() for navigation.

Get.to(NextScreen());  // Navigate to new screen
Get.off(NextScreen()); // Remove current screen from stack

7. What is the difference between Get.find() and Get.put()?

Get.put() creates and registers an instance, while Get.find() retrieves an existing instance.

8. How do you show a Snackbar, Dialog, or Bottom Sheet in GetX?

Get.snackbar("Title", "This is a GetX snackbar");
Get.defaultDialog(title: "Dialog", content: Text("Hello GetX"));
Get.bottomSheet(Container(child: Text("Bottom Sheet")));

9. What is Bindings in GetX?

class HomeBinding extends Bindings {
  @override
  void dependencies() {
    Get.lazyPut(() => HomeController());
  }
}

10. Can GetX be used for large-scale applications?

Yes, but for complex apps, organizing controllers properly and using GetX Service is recommended.

Conclusion

GetX is a powerful state management tool in Flutter, offering a simple yet efficient way to handle state, navigation, and dependency injection.

Labels:

Comments

Post a Comment

Popular posts from this blog

API Integration in Flutter - A Step-by-Step Guide

API Integration in Flutter - A Step-by-Step Guide API Integration in Flutter - A Step-by-Step Guide Learn how to integrate APIs into your Flutter app with this easy-to-follow tutorial. Step 1: Add Dependencies Start by adding the necessary dependencies for HTTP requests and JSON handling in your pubspec.yaml file. dependencies: flutter: sdk: flutter http: ^0.13.3 Run flutter pub get to install the dependencies. Step 2: Create a Service Class for API Calls Next, create a Dart file (e.g., api_service.dart ) to handle your API logic. Below is an example of a simple GET request function: import 'dart:convert'; import 'package:http/http.dart' as http; class ApiService { final String baseUrl; ApiService({required this.baseUrl...
Post a Comment
Read more

How, Purpose, and When to Use Google ML Kit in Flutter

How, Purpose, and When to Use Google ML Kit in Flutter How, Purpose, and When to Use Google ML Kit in Flutter Purpose of Google ML Kit in Flutter Google ML Kit simplifies adding AI features to mobile applications. Its primary purposes include: On-Device Machine Learning: Perform AI tasks without requiring an internet connection, ensuring low latency, privacy, and faster processing. Pre-trained Models: Use Google's robust, pre-trained models without needing ML expertise. Versatile AI Features: Enable functionalities like: Text recognition Barcode scanning Image labeling Face detection Pose detection Language identification Translation Entity extraction Smart replies When to Use Google ML Kit You should use Google ML Kit when: You need pre-built AI features withou...
Post a Comment
Read more

Implementing in-app turn-by-turn navigation in a Flutter application using Google Maps and the Directions API involves several steps

  1. Integrate Google Maps into Your Flutter App a. Add the  google_maps_flutter  Package: Include the  google_maps_flutter  package in your  pubspec.yaml  file to embed Google Maps into your Flutter application. yaml dependencies: google_maps_flutter: latest_version b. Obtain and Configure Your API Key: Generate an API Key:  Create a project in the  Google Cloud Console , enable the  Maps SDK for Android  and  Maps SDK for iOS , and generate an API key. Configure Android:  Add your API key to the  AndroidManifest.xml  file. Configure iOS:  Add your API key in the  AppDelegate.swift  file. c. Display the Map: Use the  GoogleMap  widget to display the map within your application. #dartcode import 'package:google_maps_flutter/google_maps_flutter.dart'; GoogleMap( initialCameraPosition: CameraPosition( target: LatLng(latitude, longitude), zoom: 14.0, ), onMapCreated: (Goo...
Post a Comment
Read more