10+ Amp Motors Interview Questions and Answers

I have 3 years of experience with Flutter, 5 years with Java, and 2 years with Kotlin.

• 3 years of experience with Flutter

• 5 years of experience with Java

• 2 years of experience with Kotlin

Stateful widgets maintain state that might change during the lifetime of the widget, while stateless widgets are immutable and do not change.

• Stateful widgets have a State object that can hold dynamic information and can be updated over time.

• Stateless widgets are immutable and their properties cannot change once they are initialized.

• Stateful widgets are used when the UI can change dynamically based on user interactions or other factors.

• Stateless widgets are used for static con...read more

Activity and Fragment have different life cycles in Android development.

• Activity life cycle includes onCreate, onStart, onResume, onPause, onStop, onDestroy

• Fragment life cycle includes onAttach, onCreate, onCreateView, onActivityCreated, onStart, onResume, onPause, onStop, onDestroyView, onDestroy, onDetach

• Activity can contain multiple fragments with their own life cycles

Coroutines in Kotlin are lightweight threads that help manage asynchronous tasks efficiently.

• Coroutines are more efficient than AsyncTask as they can handle multiple tasks concurrently without creating new threads.

• Coroutines are more flexible and easier to use compared to AsyncTask.

• Coroutines can be easily cancelled, unlike AsyncTask which can lead to memory leaks if not handled properly.

• WorkManager is recommended for background tasks that need to be guaranteed to run, while ...read more

Native, Hybrid, and Cross Platform development differ in their approach to building mobile applications.

• Native development involves building apps specifically for a single platform using the platform's native programming languages and tools (e.g. Java/Kotlin for Android, Swift/Objective-C for iOS).

• Hybrid development uses web technologies like HTML, CSS, and JavaScript to build apps that can run on multiple platforms with the help of frameworks like React Native or Ionic.

• Cross...read more

In Flutter, I use Provider package for state management. In native Android development, I use LiveData and ViewModel.

• In Flutter, use Provider package for managing state efficiently

• In native Android development, use LiveData and ViewModel to handle state changes

• Consider using Redux or MobX for more complex state management in Flutter

Yes, Kotlin supports native development for Android through the use of Kotlin/Native.

• Kotlin/Native allows developers to compile Kotlin code directly to native binaries, which can be used for Android development.

• It enables developers to write platform-specific code in Kotlin for Android apps.

• Kotlin/Native also supports interoperability with existing native code written in C or C++.

SOLID principles are a set of five design principles that help make software more maintainable, flexible, and scalable.

• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.

• I - Interface Segreg...read more

Grey errors in Flutter are compile-time errors, while red errors are runtime errors.

• Grey errors are compile-time errors that prevent the code from being compiled and run, such as syntax errors or type mismatches.

• Red errors are runtime errors that occur while the code is running, such as null pointer exceptions or out-of-bounds errors.