Android Interview Questions

Android programming is growing day by day. The questions asked by interviewers in android is given below. These Android Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your interview for the subject of Android. As per my experience good interviewers hardly plan to ask any particular question during your interview, normally questions start with some basic concept of the subject and later they continue based on further discussion and what you answer

Question-1. What is Android ?

Answer- 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.


Question-2. Describe Android application Architecture ?

Answer- 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


Question-3. What is An Activity ?

Answer- Activity performs actions on the screen. If you want to do any operations, we can do with activity


Question-4. What is the APK format ?

Answer- 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.


Question-5. What is An Intent ?

Answer- It is connected to either the external world of application or internal world of application, Such as opening a pdf is intent and connect to the web browser etc.


Question-6. What is an explicit Intent ?

Answer- Android Explicit intent specifies the component to be invoked from activity. In other words, we can call another activity in android by explicit intent.


Question-7. What is an implicit Intent ?

Answer- Implicit Intent doesn’t specify the component. In such case, intent provides information of available components provided by the system that is to be invoked.

Question-8. What is An android manifest file ?

Answer- Every application must have an AndroidManifest.xml file (with precisely that name) in its root directory. The manifest file presents essential information about your app to the Android system, information the system must have before it can run any of the app’s code.


Question-9. What language does android support to develop an application ?

Answer- Android applications has written using the java(Android SDK) and C/C++(Android NDK).


Question-10. What do ADT stands for?

Answer- ADT stands for Android development tool. This is useful to develop the applications and test the applications.