Android Interview Questions 2025

Beginner-level Android Interview Questions

Beginner-level Android interview questions include the following:

1. What's Android?

It is an operating system designed for mobile phones. It uses open-source software. It was originally used for touchscreens like smartphones and tablets but has since expanded to new platforms, including Android Auto, TVs, smartwatches, cameras, and Chromebooks. Developed by Android Inc., it's now maintained by Google.

The upcoming rendition, Android 16 (API position 26), is set to be released in June 2025.

2. What's an Activity in Android? 

It is an important part of Android operation. Every app has at least one activity. Unlike traditional programming models, where the main() system is the starting point of a program, Android begins execution by calling specific methods within an activity that correspond to different stages of its lifecycle. Thus, exertion is the starting point for user interaction. 

3. Why do developers use XML for front-end development?

XML describes data in a format that both people and machines can read. Android uses XML for front-end development for the following reasons:

- It's lightweight, leading to quicker and more responsive UIs
- It separates UI design from operational sense (written in Java or Kotlin), performing in a more systematic manner.
- It's simple to read, modify, and maintain, which makes streamlining the UI easier
- It supports nested layouts that allow you to create UI factors and still retain the structured code.

4. What are the key things that make up an Android application? 

An Android app majorly works together with a lot of key factors to generate a complete operation. 

These factors are approximately connected and are described in an app manifest file that outlines their places and relations. The five main factors are

- Broadcast Receivers
- Content Providers
- Activities
- Services
- Intents 

Now, let's move on to the intermediate-level Android Interview questions. 

 

Intermediate-Level Android Interview Questions

1. What's the Android Manifest file, and why is it important? 

The Android Manifest file (AndroidManifest.xml) is an XML file that gives the Android system crucial details about an app. This information includes its factors, needed permissions, and configurations. This file determines an app's structure and controls how it interacts with the system and other apps.

The significance of the Android Manifest file includes

- Declaring app components (like conditioning and services). 
- Specifying the permissions demanded to access system features( e.g., position). 
- Defining intent filters that indicate which intents each component can handle. 
- Configuring app behavior, similar to the minimal SDK version and themes.
- Setting the main activity (entry point) of the app.
- Managing external integrations with services or APIs like Google Play Services. 

2. Tell me about the different layout types in Android and when they are used.

A layout is a container that organizes UI elements on a screen.

Different layout types are used for various UI structures:

LinearLayout → This layout arranges child views in a single row or column, which is perfect for simple, linear designs. 
RelativeLayout → Position views in relation to one another using alignment rules. Ideal for complex UIs where elements must be positioned based on other components.
ConstraintLayout → Offers precise control over layout placement using constraints, making it suitable for intricate designs.
FrameLayout → This layout stacks views on top of one another, which is useful for layering elements like an image with text.
GridLayout → This layout arranges views in a grid with rows and columns. It's ideal for showing content in a table-like way, such as for an image gallery. 

3. List the four Android-supported dialog boxes. 

The four generally used dialog boxes in Android are

I. Alert Dialog → Contains selectable elements like radio buttons and checkboxes.
II.  Progress Dialog → Displays progress using a wheel or bar.
III. Date Picker Dialog → Allows users to select a date.
IV. Time Picker Dialog → Enables users to choose a time. 

4. What's an intent? Describe its different types.

An intent is a communication that allows factors to communicate and request conduct, such as launching an exertion or transferring a dispatch.

There are two types of intents:

- Implicit Intent: Doesn't specify the target element, allowing the Android system to determine which element to use. 
- Explicit intent: Directly identifies the target element, making it more straightforward to use.

5. Explain the Android SDK.

To create and write apps, Android developers will use a collection of tools like the Android Software Development Kit (SDK).  

It includes a graphical user interface that simulates a handheld, Android-powered device, which helps developers create, test, and remedy their code more efficiently. Android SDKs are included with the following tools:

- Dalvik Debug Monitoring Services
- Android Emulator
- Android Asset Packaging Tool
- Android Debug Bridge

Now, let's move forward to the advanced-level Android interview questions. 

 

Advanced-Level Android Interview Question

Advanced-level Android interview questions include the following:

1. How would you go about creating custom views in Android? 

Just like TextView, custom views are user-defined UI components that build on the features of standard Android views.

Here is how you create custom views: 

Extend the View class →To control a view's display, you must override its onDraw() method after creating a new subclass of the View class.
Handle user interaction → For handling user interaction, you can override methods such as onTouchEvent() to get a view to respond to touch input.
Define custom attributes → If necessary, produce custom attributes in XML to acclimate the view's gesture.
Inflate the custom view → Add it programmatically or by representing it in XML to your layout. 

2. What’s the difference between implicit and unequivocal intents? 

Intent intent = new Intent(this, TargetActivity.class);
startActivity(intent);

3. What are the key differences between the Dalvik Virtual Machine (DVM) and the ART runtime? 

The DVM is a virtual machine found on Android devices that executes an app's compiled bytecode. It's optimized for performance with limited memory on mobile devices for battery life.

In contrast to DVM, the Android Runtime (ART) boosts performance by compiling code ahead of time (AOT). This converts app bytecode into native machine code during installation, reducing runtime delays and making apps brisker and more effective.

Here's how DVM and ART stack up against each other:

Poor performance leads to slow loading, unhappy users, and bad reviews.

These issues can be caused by inefficient network calls or delays in UI rendering. Here is how Performance Issues should be solved:

- UI Thread Blocking: Background threads should handle long-running tasks like network requests 
- Memory Leaks: Use tools similar to LeakCanary to identify leaks and ensure that resources are duly deallocated when no longer demanded. 
- Inefficient Layouts: To streamline view hierarchies and decrease layout passes, use a ConstraintLayout. 
- Slow Network Calls: To cut down on bandwidth, use caching strategies and compress your data. Differentiate between implicit and explicit intents?

Implicit intent does not invoke the exact component. It declares an action, allowing the system to find the appropriate component. However, explicit intent specifies the component (e.g., BroadcastReceiver) to be invoked.

5. What are the main differences between an implicit and explicit intent?

An implicit intent won't trigger a specific component. An implicit intent won't trigger a specific component. However, an explicit intent names the exact component (e.g., a BroadcastReceiver) that needs to be invoked.

Here are the differences between implicit and explicit intent.

Implicit Intent:
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("https://www.example.com"));
startActivity(intent);

Explicit Intent:
Intent intent = new Intent(this, TargetActivity.class);
startActivity(intent)

6. What's the process for adding third-party libraries to an Android app, and what's the best way to handle dependencies?

Adding third-party libraries lets you easily include features. It's also a careful thing to handle dependencies well, since the app remains stable without running into problems.

Here’s a look at how to bring in third-party libraries and manage all the dependencies.

- Gradle Dependencies: You can use Gradle as your build system to handle third-party libraries. 
- Add dependencies in the build: Gradle train for integration and interpretation control.
- Maven Central and JCenter: The Grab libraries from repositories like Maven Central or JCenter, making sure you're using the most current, stable versions.
- Use Dependency Management Tools: Tools such as Gradle's Dependency Locking can prevent problems with version conflicts.
- Use Dependency Injection: Frameworks like Dagger or Hilt are used to provide dependencies and handle how long objects last.

 

Frequently Asked Questions On Android Interview questions

1. What's the best way to get ready for an Android interview?

To prepare for an Android interview, concentrate on fundamental topics such as It is also important to practice coding questions along with improving your problem-solving abilities What is an Android lifecycle?

The Android lifecycle describes the various states an Fragment goes through, starting from its creation to its destruction. What is Gradle in Android? It is a tool for automating the build process in Android development.

It helps in compiling code, handling dependencies, and generating APK files.

2. What is Maven on Android?

Maven is a tool that helps manage project deadlines, build the project, and ensure seamless integration. 

3. What are some coding questions asked in an Android Interview? 

Coding related Android interview questions mostly cover data structures and algorithms. And some Android-specific topics like UI development, multi-threading, and memory management concepts can also be covered. 

4. How should I prepare for Android interview questions?

To ace the Android interview, start with the revision for key concepts and coding problems. Then move on to practiving with real-world projects and be prepared to display your problem-solving and debugging abilities. 

5. What programming languages are typically asked about in an Android interview?

Java and Kotlin are the main programming languages for Android development. But Java is still commonly used while Kotlin has become the preferred choice for modern Android development.

6. Which platforms are best for practicing coding for an Android interview?

When practicing for interviews, developers usually guide towards platforms like HackerRank, LeetCode, and CodeSignal.

7. Where's the best place to find practice Android interview questions? 

Android interview questions can be found from various sources. Some online blogging platforms like Sprintzeal and Stack Overflow has a collection of Android development blogs.

 

Conclusion

Preparing for Android interview needs a strong understanding of fundamental concepts. Professionals should also get used to practicin advanced development practices. This article was designed keeping in mind that professional of all status like fresher and experienced professionals. This content will boost your confidence and help you ace your interviews.