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Prepared By : Uday Shah (HOD-IT)
Contact No : 7600044051
E-Mail : rupareleducation@gmail.com
Android Short Questions for all IT students
·
What is Android?
Android is an open-source,
linux-based operating system that is used in mobiles, tablets, televisions etc.
·
Who is the founder of Android?
Andy Rubin.
· Which kernal is used in android?
Android is customized Linux 3.6
kernel.
·
Explain the Android application Architecture.
Following is a list of components of
Android application architecture:
- Services: Used to perform background functionalities.
- Intent: Used to 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.
·
What are the code names of android?
1. Aestro
2. Blender
3. Cupcake
4. Donut
5. Eclair
6. Froyo
7. Gingerbread
8. Honycomb
9. Ice Cream Sandwitch
10. Jelly
Bean
11. Kitkat
12. Lollipop
13. Marshmallow
14. Orario
·
What are the advantages of android?
Open-source: It means no licence,
distribution and development fee.
Platform-independent: It supports windows, mac and
linux platforms.
Supports various technologies: It supports camera, bluetooth,
wifi, speech, EDGE etc. technologies.
Highly optimized Virtual Machine: Android uses highly optimized
virtual machine for mobile devices, called DVM (Dalvik Virtual Machine).
·
Does android support other language than java?
Yes, android app can be developed in
C/C++ also using android NDK (Native Development Kit). It makes the performance
faster. It should be used with android SDK
·
What are the core building blocks of android?
The core building blocks of android
are:
- Activity
- View
- Intent
- Service
- Content Provider
- Fragment etc.
·
What is activity?
Activity is like a frame or window in
java that represents GUI. It represents one screen of android.
·
What are the life cycle methods of android activity?
There are 7 life-cycle methods of
activity. They are as follows:
1. onCreate()
2. onStart()
3. onResume()
4. onPause()
5. onStop()
6. onRestart()
- onDestroy()
·
What is intent?
It is a kind of message or
information that is passed to the components. It is used to launch an activity,
display a web page, send sms, send email etc. There are two types of intents in
android:
1. Implicit Intent
- Explicit Intent
·
What is implicit intent in android?
Implicit intent is used to invoke the
system components.
·
What is explicit intent in android?
Explicit intent is used to invoke the
activity class.
·
What is content provider?
Content providers are used to share
information between android applications.
·
What is ADB?
ADB stands for Android Debug Bridge.
It is a command line tool that is used to communicate with the emulator
instance.
·
What is an APK format?
APK is a short form stands for
Android Packaging Key. It is a compressed key with classes,UI's, supportive
assets and manifest. All files are compressed to a single file is called APK.
·
What is ADT in Android?
ADT stands for Android Development
Tool. It is used to develop the applications and test the applications.
·
What is View Group in Android?
View Group is a collection of views
and other child views. It is an invisible part and the base class for layouts.
·
What is DDMS?
DDMS stands for Dalvik Debug Monitor
Server. It gives the wide array of debugging features:
1. Port forwarding services
2. Screen capture
3. Thread and heap information
4. Network traffic tracking
- Location data spoofing
·
What are the basic tools used to develop an android app?
- JDK
- Eclipse+ADT plugin
- SDK Tools
·
What is the AndroidManifest.xml?
This file is essential in every
application. It is declared in the root directory and contains information
about the application that the Android system must know before the codes can be
executed.
· What is shared preferences in
android?
Shared preferences are the simplest
mechanism to store the data in XML documents.
· What does the intent filter do in
android?
Intent filters are filter out the
intents.
· What is drawable folder in android?
A compiled visual resource that can
used as a backgrounds, banners, icons, splash screen etc.
· What is a service in android?
The Service is like as an activity to
do background functionalities without UI interaction.
· How is the use of web view in
Android?
WebView is UI component that can
display either remote web-pages or static HTML
· What is Context?
The context is the central command
center for an Android application. All application-specific functionality can
be accessed through the context.
·
What
is an Activity?
An Android application is a
collection of tasks, each of which is called an Activity. Each Activity within
an application has a unique task or purpose.
· What is an Intent?
The Android operating system uses an
asynchronous messaging mechanism to match task requests with the appropriate
Activity. Each request is packaged as an
Intent. You can think of each such request as a message stating an intent to do something.
Intent. You can think of each such request as a message stating an intent to do something.
·
What
is a Service?
Tasks that do not require user
interaction can be encapsulated in a service. A service is most useful when the
operations are lengthy, offloading time-consuming processing or need
to be done
regularly such as
checking a server for new mail.