8
Q:

What are the features added in iOS 9 ? 

Answer:



Q:

Data structure suitable for an application discussed in?

A) procedural design B) architectural design
C) data design D) interface design
 
Answer & Explanation Answer: C) data design

Explanation:
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1 9
Q:

What JSON framework is supported by iOS (iPhone OS) ?

Answer

  • SBJson framework is supported by iOS.

  • It is a JSON parser and generator for Objective-C (Objective-C is the primary programming language you use when writing software for OS X and iOS. It is a superset of the C-programming language and provides object-oriented capabilities and a dynamic runtime).

  • SBJson provides flexible API's and additional control that makes JSON handling easy.

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8 388
Q:

Where can you define the icon for your Activity ?

Answer

Icon for an Activity is defined in the manifest file.


Code


<activity android:icon="@drawable/app_icon" android:name=".MyTestActivity"></activity>


...

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1 361
Q:

Why cannot you run standard Java byte code on Android ?

Answer

Android uses Dalvik Virtual Machine (DVM) which requires a special bytecode. We need to convert Java class files into Dalvik Executable files using an Android tool called "dx". In normal circumstances, developers will not be using this tool directly and build tools will care for the generation of DVM compatible files.

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1 272
Q:

What are intents, shared preference in android ?

Answer

An Android Intent is an abstract description of an operation to be performed. It can be used with startActivity to launch an Activity, broadcastIntent to send it to any interested BroadcastReceiver components, and startService(Intent) or bindService(Intent, ServiceConnection, int) to communicate with a background Service.The intent itself, an Intent object, is a passive data structure holding an abstract description of an operation to be performed.
Android provides many ways of storing data of an application. One of this way is called Shared Preferences. Shared Preferences allow you to save and retrieve data in the form of key,value pair.


In order to use shared preferences, you have to call a method getSharedPreferences() that returns a SharedPreference instance pointing to the file that contains the values of preferences.

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3 615
Q:

What role does Dalvik play in Android development ?

Answer

Dalvik serves as a virtual machine, and it is where every Android application runs. Through Dalvik, a device is able to execute multiple virtual machines efficiently through better memory management.

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3 314
Q:

What is ADB in Android ?

Answer

Adb is short for Android Debug Bridge. It allows developers the power to execute remote shell commands. Its basic function is to allow and control communication towards and from the emulator port.

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3 324
Q:

What are three ways to reduce page load time?

Answer

There are many answers here: Reduce image sizes, remove unnecessary widgets, HTTP compression, put CSS at the top and script references at the bottom or in external files, reduce lookups, minimize redirects, caching, etc.

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