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Android Interview Questions and Answers For Freshers Part-1

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android1.What is Android?
Android is a stack of software for mobile devices which includes an Operating System, middleware and some key applications. The application executes within its own process and its own instance of Dalvik Virtual Machine.

2.Describe Android application Architecture?
Android application architecture has the following components.They are as follows −

Services − It will perform background functionalities

Intent − It will perform the inter connection between activities and the data passing mechanism

Resource Externalization − strings and graphics

Notification − light,sound,icon,notification,dialog box,and toast

Content Providers − It will share the data between applications

3.What is An Activity?
Activity performs actions on the screen.If you want to do any operations, we can do with activity

4.What is the APK format?
The Android packaging key is compressed with classes,UI’s, supportive assets and manifest.All files are compressed to a single file is called APK.

5.What is An Intent?
It is connected to either the external world of application or internal world of application ,Such as, opening a pdf is an intent and connect to the web browser.etc.

6.What is an explicit Intent?
It is useful to connect external world of application, for example, connecting to web browser.

7.What is an implicit Intent?
It is useful to connect internal world of application, Such as, connecting one activity to another activity.

8.What is An android manifest file?
An android manifest file holds application code,resources,permissions,icons and themes,An application should need at least one manifest file.

9.What language does android support to develop an application?
Android applications has written using the java(Android SDK) and C/C++(Android NDK).

10.What do ADT stands for?
ADT stands for Android development tool,This is useful to develop the applications and test the applications.

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