favorite jQuery questions and answers.Top 10 most common jQuery interview questions and answer to ask.

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favorite jQuery FAQ jQuery Interview Questions and Answers for Experiences and Freshers.

When Jquery founded and by whome?

It was released in January 2006 at BarCamp NYC by John Resig(Jquery founder).

jQuery 2014-01-02 11:35:25

What is jQuery?

jQuery is fast, lightweight and feature-rich client side JavaScript Library/Framework which helps in to traverse HTML DOM, make animations, add Ajax interaction, manipulate the page content, change the style and provide cool UI effect. It is one of the most popular client side library and as per a survey it runs on every second website.

jQuery 2014-01-02 11:35:49

Why do we use jQuery?

Easy to use and learn.

Easily expandable.

Cross-browser support (IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+)

Easy to use for DOM manipulation and traversal.

Large pool of built in methods.

AJAX Capabilities.

Methods for changing or applying CSS, creating animations.

Event detection and handling.

Tons of plug-ins for all kind of needs.

jQuery 2014-01-02 11:36:22

How JavaScript and jQuery are different?

JavaScript is a language While jQuery is a library built in the JavaScript language that helps to use the JavaScript language.

jQuery 2014-01-03 09:10:54

Is jQuery replacement of Java Script?

No. jQuery is not a replacement of JavaScript. jQuery is a different library which is written on top of JavaScript.

jQuery is a lightweight JavaScript library that emphasizes interaction between JavaScript and HTML.

jQuery 2014-01-03 09:11:20

Is jQuery a library for client scripting or server scripting?

Client side scripting.

jQuery 2014-01-03 09:11:45

What is the basic need to start with jQuery?

To start with jQuery, one need to make reference of it's library.

The latest version of jQuery can be downloaded from jQuery.com.

jQuery 2014-01-03 09:12:16

Which is the starting point of code execution in jQuery?

The starting point of jQuery code execution is $(document).ready() function which is executed when DOM is loaded.

jQuery 2014-01-03 09:12:40

What does dollar sign ($) means in jQuery?

Dollar Sign is nothing but it's an alias for JQuery. Take a look at below jQuery code.

$(document).ready(function(){

});

jQuery(document).ready(function(){

});

Over here $ sign can be replaced with "jQuery" keyword.

jQuery 2014-01-03 09:14:55

Can we have multiple document.ready() function on the same page?

YES. We can have any number of document.ready() function on the same page.

jQuery 2014-01-03 09:15:25

Can we use our own specific character in the place of $ sign in jQuery?

YES. It is possible using jQuery.noConflict().

jQuery 2014-01-03 09:16:26

What is jQuery.noConflict?

As other client side libraries like MooTools, Prototype can be used with jQuery and they also use $()

as their global function and to define variables. This situation creates conflict as $() is used by jQuery and other library as their global function.

To overcome from such situations, jQuery has introduced jQuery.noConflict().

jQuery.noConflict();

// Use jQuery via jQuery(...)

jQuery(document).ready(function(){

jQuery("div").hide();

});

You can also use your own specific character in the place of $ sign in jQuery.

var $j = jQuery.noConflict();

// Use jQuery via jQuery(...)

$j(document).ready(function(){

$j("div").hide();

});

jQuery 2014-01-03 09:18:06

Is there any difference between body onload() and document.ready() function?

document.ready() function is different from body onload() function for 2 reasons.

1) We can have more than one document.ready() function in a page where we can have only one body onload function.

2) document.ready() function is called as soon as DOM is loaded where body.onload() function is called

when everything gets loaded on the page that includes DOM, images and all associated resources of the page.

jQuery 2014-01-03 09:18:43

What is the difference between .js and .min.js?

jQuery library comes in 2 different versions Production and Deployment.

The deployment version is also known as minified version.

So .min.js is basically the minified version of jQuery library file. Both the files are same as far as functionality is concerned

but .min.js is quite small in size so it loads quickly and saves bandwidth.

jQuery 2014-01-04 09:11:01

What is jQuery Selectors? What are selectors in jQuery and how many types of selectors are there?

Selectors are used in jQuery to find out DOM elements. Selectors can find the elements via ID, CSS, Element name and hierarchical position of the element.

Name: Selects all elements which match with the given element Name.

#ID: Selects a single element which matches with the given ID

.Class: Selects all elements which match with the given Class.

Universal (*): Selects all elements available in a DOM.

Multiple Elements E, F, G: Selects the combined results of all the specified selectors E, F or G.

Attribute Selector: Select elements based on its attribute value.

jQuery 2014-01-04 09:11:34

favorite jQuery Job Interview Questions And Answers