Android Questions And Answers

21⟩ Explain What are the differences between a domain and a workgroup?

In a domain, one or more computer can be a server to manage the network. On the other hand in a workgroup all computers are peers having no control on each other. In a domain, user doesn’t need an account to logon on a specific computer if an account is available on the domain. In a work group user needs to have an account for every computer.

In a domain, Computers can be on different local networks. In a work group all computers needs to be a part of the same local network.

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22⟩ What is the TTL (Time to Live) and why is it required?

TTL is a value in data packet of Internet Protocol. It communicates to the network router whether or not the packet should be in the network for too long or discarded. Usually, data packets might not be transmitted to their intended destination within a stipulated period of time. The TTL value is set by a system default value which is an 8-bit binary digit field in the header of the packet. The purpose of TTL is, it would specify certain time limit in seconds, for transmitting the packet header. When the time is exhausted, the packet would be discarded. Each router receives the subtracts count, when the packet is discarded, and when it becomes zero, the router detects the discarded packets and sends a message, Internet Control Message Protocol message back to the originating host.

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23⟩ List the components of Android?

The main components of Android are:

1) Activity

2) Intent

3) Service

4) Broadcast receiver

5) Content Provider

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24⟩ Define the Content provider component of Android?

Content provider is a data store that enables data sharing across different applications. Content providers provide a uniform interface to access the data. An example is Call logs.

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25⟩ Define the Services component of Android?

Services are components that do not have a User Interface; they run in the background. An example of Service component in Facebook app would be the friend request notifications. They would continue to run, even if you switch to another activity or application.

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26⟩ Define the activity component of Android?

Activity provides an interface for users to interact with the application and take an action; for instance: Login to a website. The different screens/windows of an application are the different activities. An application generally has multiple activities.

Activities are like the pages in a website. For instance, in a Facebook app, the login screen is one activity, and the news feeds from your friends after signing in would be another one.

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27⟩ Define the Intent component of Android?

Think of Intent as a message to allow the application to request action from the other application components (like activity), for instance VIEW, CALL, PLAY etc.

Suppose, on your Facebook app, the running activity is the Newsfeed, and you want to view (in full frame) a pic your friend posted. The click action on the photo would be the View Photo Intent, and the Photo screen (which is a new activity) gets loaded on the click (as the message is communicated).

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28⟩ Define Broadcast receiver component of Android?

A Broadcast receiver comes into action only in specific situations. Suppose an Intent for which a particular broadcast receiver has been registered occurs, the broadcast receiver is triggered into action and the user gets a notification for the same. (For example: Battery low notification).

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29⟩ Define sticky intent in Android?

sendStickyBroadcast() performs a sendBroadcast(Intent) known as sticky, i.e. the Intent you are sending stays around after the broadcast is complete, so that others can quickly retrieve that data through the return value of registerReceiver(BroadcastReceiver, IntentFilter). In all other ways, this behaves the same as sendBroadcast(Intent).

Example of a sticky broadcast sent via the operating system is ACTION_BATTERY_CHANGED. When you call registerReceiver() for that action even with a null BroadcastReceiver you get the Intent that was last broadcast for that action. Hence, you can use this to find the state of the battery without necessarily registering for all future state changes in the battery.

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30⟩ Define resource in Android?

A user defined JSON, XML, bitmap, or other file, injected into the application build process, which can later be loaded from code.

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31⟩ How you can handle an audio stream for a call in Android?

Permission.PROCESS_OUTGOING_CALLS: Will Allow an application to monitor, modify, or abort outgoing calls. So using that permission we can monitor the Phone calls.

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32⟩ Tell me does Android support the Bluetooth serial port profile?

Yes.

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33⟩ Is it possible to started an application on powerup?

Yes.

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34⟩ Define APK format for Android?

The APK file is compressed AndroidManifest.xml file with extension .apk. It also includes the application code (.dex files), resource files, and other files which are compressed into a single .apk file.

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35⟩ Do you know how to translate in Android?

The Google translator translates the data of one language into another language by using XMPP to transmit data. You can type the message in English and select the language which is understood by the citizens of the country in order to reach the message to the citizens.

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36⟩ Tell me what is needed to make multiple choice list with custom view for each row?

Multiple choice list can be viewed by making the CheckBox android:id value be "@android:id /text1″. That is the ID used by Android for the CheckedTextView in simple_list_item_multiple_choice.

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37⟩ Explain the difference between nine-patch image vs regular Bitmap image?

It is one of a re-sizable bitmap resource which is being used as backgrounds or other images on the device. The Nine-Patch class allows drawing a bitmap in nine sections. The four corners are un-scaled; the middle of the image is scaled in both axes, the four edges are scaled into one axis.

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38⟩ How much dialog boxes are supported in android?

Android supports 4 dialog boxes:

★ AlertDialog

★ ProgressDialog

★ DatePickerDialog

★ TimePickerDialog

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39⟩ Define TimePickerDialog in Android?

This dialog box is used for selecting time by the user.

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40⟩ Define DatePickerDialog in Android?

This dialog box is used for selecting a date by the user.

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Android

Home Mobile Technologies Android

62 Android Questions And Answers

21⟩ Explain What are the differences between a domain and a workgroup?

22⟩ What is the TTL (Time to Live) and why is it required?

23⟩ List the components of Android?

24⟩ Define the Content provider component of Android?

25⟩ Define the Services component of Android?

26⟩ Define the activity component of Android?

27⟩ Define the Intent component of Android?

28⟩ Define Broadcast receiver component of Android?

29⟩ Define sticky intent in Android?

30⟩ Define resource in Android?

31⟩ How you can handle an audio stream for a call in Android?

32⟩ Tell me does Android support the Bluetooth serial port profile?

33⟩ Is it possible to started an application on powerup?

34⟩ Define APK format for Android?

35⟩ Do you know how to translate in Android?

36⟩ Tell me what is needed to make multiple choice list with custom view for each row?

37⟩ Explain the difference between nine-patch image vs regular Bitmap image?

38⟩ How much dialog boxes are supported in android?

39⟩ Define TimePickerDialog in Android?

40⟩ Define DatePickerDialog in Android?

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Android

Home Mobile Technologies Android

62 Android Questions And Answers

21⟩ Explain What are the differences between a domain and a workgroup?

22⟩ What is the TTL (Time to Live) and why is it required?

23⟩ List the components of Android?

24⟩ Define the Content provider component of Android?

25⟩ Define the Services component of Android?

26⟩ Define the activity component of Android?

27⟩ Define the Intent component of Android?

28⟩ Define Broadcast receiver component of Android?

29⟩ Define sticky intent in Android?

30⟩ Define resource in Android?

31⟩ How you can handle an audio stream for a call in Android?

32⟩ Tell me does Android support the Bluetooth serial port profile?

33⟩ Is it possible to started an application on powerup?

34⟩ Define APK format for Android?

35⟩ Do you know how to translate in Android?

36⟩ Tell me what is needed to make multiple choice list with custom view for each row?

37⟩ Explain the difference between nine-patch image vs regular Bitmap image?

38⟩ How much dialog boxes are supported in android?

39⟩ Define TimePickerDialog in Android?

40⟩ Define DatePickerDialog in Android?

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