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Q:

Which API is used to write test scripts that help in exercising the application's user interface elements? 

Answer:
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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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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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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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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Q:

What is the purpose of canvas in HTML?

Answer

Canvas is an element that is used for the graphics for the web page. It uses JavaScript to bring the graphics functionality live. It allows easy way to draw the graphics and use different types of tools to create drawing on the web page. Canvas is just a rectangular area that controls the pixel of every element that is used in the web page. Canvas uses methods like paths, circles, etc. The canvas element will be used as follows:


<canvas id="can" width="200" height="100"></canvas>


The canvas element includes id, width and height settings and with the javascript it gets used like:


<script type="text/javascript">


var c=document.getElementById("can");


var ctx=c.getContext("2d");


ctx.fillStyle="#FF0000";


ctx.fillRect(0,0,150,75);


</script>

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