Crayon Data – Android Interview Questions
Here is the list Android Interview Questions which are recently asked in Crayon Data company. These questions are included for both Freshers and Experienced professionals.
1. What is Android?
Android is an open-source and Linux-based operating system. It was first introduced on Nov 5, 2007. Android provides a rich application framework that allows us to build the innovative apps and games for mobile devices in a Java language environment.
2. Describe Android application Architecture?
Android architecture is a software stack of components to support the mobile device needs. Android software stack contains a Linux Kernel, collection of c/c++ libraries which are exposed through an application framework services, runtime, and application.
3. What is An Activity?
An activity is a single screen in android. It is like a window or frame of Java. By the help of activity, you can place all your UI components or widgets in a single screen. Activity is like a frame or window in java that the represents GUI.
4. What is the APK format?
APK stands for Android application PacKage. An application file ready for installation in an Android device. The compressed APK file, which is a ZIP archive in the JAR format, is distributed to Android users for installation in their smartphones and tablets.
5. What is An Intent?
Android Intent is the message that is passed between components such as activities, content providers, broadcast receivers, services etc. It is generally used with startActivity() method to the invoke activity, broadcast receivers etc. The dictionary meaning of intent is intention or purpose.
6. What is An android manifest file?
The Android Manifest is an XML file which contains important metadata about the Android app. This includes the package name, activity names, main activity, Android version support, hardware features support, permissions, and the other configurations.
7. What language does android support to develop an application?
- Java.
- Kotlin.
- C++ .
- C# .
- Python.
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8. What are the tools are placed in An Android SDK?
Android SDK Build-Tools is a component of the Android SDK required for the building Android apps. It's installed in the
9. What is a service in android?
An Android service is a component that is designed to do some work without a user interface. A service might download a file, play music, or apply a filter to an image. Services can also be used for the interprocess communication between Android applications.
10. What is a content provider in android?
A content provider manages access to a central repository of data. A provider is part of an Android application, which often provides its own UI for working with the data. However, content providers are primarily intended to be used by the other applications, which access the provider using a provider client object.
11. What are the notifications available in android?
Android proposes several types of notifications to inform the user:- The notifications in the system bar.
- The sound notifications.
- The notifications by vibration.
- The notifications by switching the LED on.
- The use of "Toast" messages.
- Versions 19 and later. the push notifications. New in version 19. the push notifications.
12. What is container in android?
A container is a view used to contain other views. Android offers a collection of view classes that act as the containers for views. These container classes are called layouts, and as the name suggests, they decide the organization, size, and position of their children views.
13. What is ADB in android?
Android Debug Bridge is a versatile command-line tool that lets you communicate with a device. The adb command facilitates a variety of device actions, such as installing and debugging apps, and it provides access to a Unix shell that you can use to run a variety of commands on a device.
14. What is an Adapter in android?
An Adapter object acts as a bridge between an AdapterView and the underlying data for that view. The Adapter provides access to the data items. The Adapter is also responsible for making a View for each item in the data set.
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