Top 100 Android Interview Questions and Answers

There are four main types of services available in Android: Foreground Service, Background Service, Bound Service, and Intent Service.

• Foreground Service: Runs in the foreground with a visible notification. Example: Music player.

• Background Service: Runs in the background without a user interface. Example: Location tracking service.

• Bound Service: Allows other components to bind to it and interact with it. Example: Music player service bound to a music player activity.

• Intent Ser...read more

The latest version of Android is Android 12.

• Android 12 was released on October 4, 2021.

• It includes new features such as Material You design, privacy enhancements, and improved performance.

• Some devices may not receive the update immediately due to manufacturer and carrier restrictions.

Android run time environment is a virtual machine that runs Android apps and provides a layer between apps and the operating system.

• Android run time environment is also known as ART.

• It compiles apps into machine code for faster performance.

• It supports multiple programming languages like Java, Kotlin, and C++.

• It provides a sandboxed environment for apps to run in, ensuring security and stability.

• It includes garbage collection to manage memory usage.

• It allows for dynamic code l...read more

Data flows from user application to driver in Android device through various layers of the Android framework, including the application framework, system services, and the Linux kernel.

• User application makes a request to the Android framework API.

• The Android framework forwards the request to the appropriate system service.

• The system service communicates with the Linux kernel to interact with the device driver.

• The device driver processes the request and sends back the response...read more