Android Interview Questions

Posting the list of Interview questions that i have faced in the recent time. The questions in interview will be basic and fundamental. It can be asked to freshers and experienced ones also.

Android Questions

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List of Interview questions:

1. What is Activity?
Ans: Activity is an important component of android application. It is the visible screen which enables the user to interact with the application as example making calls, sending messages and many more.
2. What is Broadcast Receiver?
Ans: It is one among the building blocks of android application which lets the user notify/alert regarding notifications.

3. What is Intent.
And: Intent is a class used to activate various other components in android applications like Services, Activities and broadcast receivers. It also used while switching from one activity to another activity. Intent are of two types; Implicit intent and Explicit intent.

4. What is Service and the different types of Service?

5. What the difference between BaseAdapter and ListAdapter?

6. Define the architecture of Android?

7. What is a Fragment? Call back methods of Fragment.

8. Can we call attach() method before onStart() method.

9. What's the state of the child thread when parent thread is in paused state.

10. Why we use JSON in android application.

11. Name some of the class used for Location and Sensors.

12. Difference between Location and LocationManager class

13. Can we use layout_gravity in relative layout. If not why?

14. What is the difference between layout_gravity and gravity attribute?

15. How to make a button or a view transparent?
16. How to apply border to a button?
17. What is Adapter and uses of adapter?
18. Why cannot you run standard java byte codes in android?
Ans: Android used Dalvik Virtual Machine which requires the files to be in .dex format. Therefore it's not possible to run java byte codes.
19. Languages used for developing android applications?
Ans: Java, C and C++