Android Interview Questions Cheat Sheet

source: trainings.internshala.com

Welcome to your complete guide for Android interview preparation! This article covers the most common Android interview questions with simple explanations and examples. Whether you’re a beginner or experienced developer, this guide will help you prepare for your next Android interview.

Basic Android Concepts

1. What is Android?

Android is a mobile operating system created by Google. It’s like the Windows of mobile phones — it controls how your phone works and runs apps. It’s free and open-source, which means anyone can use and modify it.

2. What are the main components of an Android app?

There are four main building blocks:

• Activities: These are the screens you see in an app. Think of them as different pages in a book. Example:

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

• Services: These run in the background without a screen. Like music playing when your screen is off. Example:

public class MusicService extends Service {
    @Override…