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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.

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