JQuery interview questions and Answers

Last updated on Jan 09, 2023
  • Share
JQuery interview questions

jQuery is a feature-rich, lightweight, and fast JavaScript library, which makes HTML documents, event handling, Ajax, and animation easier with a simple API that works across almost all browsers. These jQuery interview questions will enhance your skills and help you to write in a mainstream JavaScript library, used by major players. The critical purpose of jQuery is to make using JavaScript more convenient on your website. A great combination of extensibility and flexibility, jQuery takes a lot of general tasks that require multiple lines of JavaScript code and wraps them in a manner that you can use with a single line of code.

Most Frequently Asked JQuery interview questions

Here in this article, we will be listing frequently asked JQuery interview questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q21. Please explain remove class jquery with example?



Q22. What is .end() in jQuery?

jQuery end() technique ends the most recent filtering operation in the current chain, and return the matched set of factors to its preceding state. This technique does now not take any arguments.

Q23. What is jQuery?

jQuery is a javascript library which was created by John Resig in the year 2006.jQuery was designed to make the javascript coding easy to use while creating the website and the applications. jQuery is the free open-source software. It is the most popular and the most used javascript library.

Q24. What is JQuery.noConflict? Explain

As like many other JavaScript libraries, jQuery uses $ as a variable name or function All the functionalities available in jQuery is without using $. The JQuery.noConflict method is used to give control of the $ variable back to the library which implemented it. This helps developers to make sure that the $object of libraries doesn’t conflict with jQuery operations.

Q25. What is CDN? Explain

CDN stands for Control Delivery Network.CDN is the group of many servers which are located at the many different locations. The job of these servers is to store the copy of the data with them so that they can acknowledge the data request based on which server is nearest to the end user. As a result, the data reaches to the end user very fast and very less affected by the traffic.

Q26. What are selectors in jQuery? Explain

Selectors are the formats used to identify and operate HTML elements. For instance, to select all checkboxes in a web form then we can use [type="checkbox"] selector.



var input = $( "form input:checkbox" )

.wrap( "" )


.css({ background: "yellow", border: "3px red solid" });


Q27. What are the advantages of Jquery?
  • jQuery combines good practices of the programming
  • jQuery application is easy
  • jQuery saves the bandwidth of the server
  • jQuery runs on all internet leading browsers like Firefox, Chrome, Microsoft Edge
  • The coder can add plugins as per their requirement.
Q28. What is a DOM in jQuery? How can we make sure that DOM is ready?

DOM is “Document Object Model” which is treemap of all HTML elements in web form loaded by the browser.

We can use The .ready() method provides a way to run a JavaScript code as soon as the page's Document Object Model (DOM) becomes safe to manipulate.

Q29. How we can hide a block of HTML code on a button click using jQuery?

The .hide() method is used for hiding a particular element.


// With the element initially shown, we can hide it slowly:

$( "#clickme" ).click(function() {
   $( "#book" ).hide( "slow", function() {
      alert( "Animation done." );

Q30. In jQuery, what is the meaning of toggle?

toggle() is an important type of procedure that is used to toggle between the methods of the hide() and show(). It simply attached multiple functions to toggle for the selected elements. You can consider that it shows the hidden elements and hide the shown elements.



Development History of jQuery

jQuery was released by John Resig at the BarCamp NYC in January 2006. Currently, it is headed by Timmy Wilson and managed by a team of expert developers.

Latest Version: The most recent version is 3.5.0, which was released on 4th May 2020.

  • Easy to learn and intuitive
  • Deals with many cross-browser bugs
  • Clean and simple syntax
  • Open source library
  • Highly extensible

These jQuery interview questions will help you prepare for your upcoming job interview as well and fast-track your career, whether you are a fresher or an experienced Jquery developer.

Reviewed and verified by Best Interview Question
Best Interview Question

With our 10+ experience in PHP, MySQL, React, Python & more our technical consulting firm has received the privilege of working with top projects, 100 and still counting. Our team of 25+ is skilled in...