MuleSoft Frequently Asked JavaScript Interview Questions

MuleSoft Most Frequently Asked Latest JavaScript Interview Questions Answers

What are the browser related issues for jQuery?

Browser compatibility of jQuery plugin is an issue and needs lot of time to fix it.

Whether we need to add jQuery file in both Master and Content page?

jQuery file should be added to the Master page and can use access from the content page directly without having any reference to it.

What are the basic selectors in jQuery?

Following are the basic selectors in jQuery:

Element ID
CSS Name
Tag Name
DOM hierarchy

Can we call C# code behind using jQuery?

Yes, we can call C# code from jQuery as it supports .net application.

What is the use jQuery.data method?

jQuery.data methods is used to associate the data with the DOM nodes and the objects. This data method makes the jQuery code clear and concise.

What is the use of each function in jQuery?

Each function is used to iterate each and every element of an object. It is used to loop DOM elements, arrays and the object properties.

MuleSoft Most Frequently Asked Latest JavaScript Interview Questions Answers

What is the difference between size and length of jQuery?

Size and length both returns the number of element in an object. But length is faster than the size because length is a property and size is a method.

Can we add more than one ‘document.ready’ function in a page?

Yes, we can add more than one document.ready function in a page. But, body.onload can be added once in a page.

What is the use of jQuery load method?

jQuery load method is a powerful AJAX method which is used to load the data from a server and assign the data into the element without loading the page.

Whether our own specific characters are used in place of $ in jQuery?

Yes, We can use our own variable in place of $ by using the method called no Conflict () method.

var sample = $.noConflict()

What are the four parameters used for jQuery Ajax method?

The four parameters are

URL – Need to specify the URL to send the request
type – Specifies type of request(Get or Post)
data – Specifies data to be sent to server
Cache – Whether the browser should cache the requested page

What is the use of jQuery filter?

The jQuery filter is used to filter the certain values from the object list based on the criteria. Example is to filter certain products from the master list of products in a cart website.

Which program is useful for testing jQuery?

QUnit is used to test jQuery and it is very easy and efficient.

What is CDN?

CDN is abbreviated as Content Distribution network and it is said to be a group of companies in different location with network containing copies of data files to maximize bandwidth in accessing the data.

What are the two types of CDNs?

There are two types of CDNs:

Microsoft – Load jQuery from Ajax CDN
Google – Load jQuery from Google libraries API

Which sign is used as a shortcut for jQuery?

Dollar ($) sign is used as a shortcut for jQuery.

Is jQuery is a client or server scripting?

jQuery is a client scripting.

What is the script build up by jQuery?

jQuery is a Javascript file and it is single javascript file that contains common DOM, event effects and Ajax functions.

How can we debug jQuery?

There are two ways to debug jQuery:

Debugger keyword

Add the debugger to the line from where we have to start debugging and then run Visual Studio in Debug mode with F5 function key.
Insert a break point after attaching the process

What are all the ways to include jQuery in a page?

Following are the ways to include jQuery in a page:

Local copy inside script tag
Remote copy of jQuery.com
Remote copy of Ajax API
Local copy of script manager control
Embedded script using client script object