Fresh Team Leader Android Developer Interview Questions & Answers:

1. Explain me what is an implicit Intent?

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

2. Explain me what is a Sticky Intent in android?

Sticky Intent is also a type of intent which allows the communication between a function and a service for example,sendStickyBroadcast() is perform the operations after completion of intent also.

3. Explain me how can ANR be prevented?

One technique that prevents the Android system from concluding a code that has been responsive for a long period of time is to create a child thread. Within the child thread, most of the actual tasks of the codes can be placed, so that the main thread runs with minimal periods of unresponsive time.

4. Please explain what is a content provider in android?

A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. A content provider can use different ways to store its data and the data can be stored in a database, in files, or even over a network.

5. Tell us is it okay to change the name of an application after its deployment?

It is not recommended to change the application name after its deployment because this action may break some functionality. For example, shortcuts will not work if you change application name.

6. Tell me why can't you run java byte code on Android?

Android uses DVM (Dalvik Virtual Machine ) rather using JVM(Java Virtual Machine), if we want, we can get access to .jar file as a library.

7. Please explain what is sleep mode in android?

Sleep mode mean CPU will be sleeping and it doesn't accept any commands from android device except Radio interface layer and alarm.

8. Tell me what does the intent filter do in android?

Intent filters are filter out the intents.

9. Explain what is an ANR notification in Android?

ANR is short for Application Not Responding. Android systems show this dialog if the application is performing too much of task on the main thread and has been unresponsive from a long time.

10. Explain me what are the different storage methods in Android?

Android offers several different options for data persistence. Shared Preferences – Store private primitive data in key-value pairs. This sometimes gets limited as it offers only key-value pairs. You cannot save your own java types. Internal Storage – Store private data on the device memory.