JQuery interview questions and Answers

Last updated on Jan 09, 2023
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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.

Q41. How to set attributes of an element using jQuery?

Using the jQuery attr() method attributes, an element can be set and added. This is also dynamically done in HTML elements.




Q42. How we can remove an attribute of an HTML tag in jQuery?

Developers can use the removeAttr() method to remove an attribute of an HTML tag in jQuery. This method can remove one or more attributes from the selected element.

The syntax to use the following action is: $(selector).removeAttr(attribute)

Q43. How we can get the input value of an element using jQuery?

To achieve the following function, we can use the val() function or attr function (limited to some fields).

The syntaxes to be used to receive the input value of an element using jQuery are as following:


Q44. How we can set the html contents of an element in jQuery?

The HTML() method is utilized to set content. It overwrites the whole content for the matched elements.


$('#IDNAME').html('<p>Best Interview Question</p>');

Q45. What is event preventDefault () and event stopPropagation () in Jquery?

The preventDefault() function is used to prevent the default action the browser performs on that event, whereas the stopPropagation() method stops the game from bubbling up to the event chain. The divs click handler never works with stopPropagation(). With preventDefault(), the divs click handler works but browsers default action gets stopped.

Q46. What is a filter in jQuery? Explain

In jQuery, the filter() method is used to create an array filled with all array elements that pass a test provided as a function. The technique doesn’t change the original collection or execute the array elements’ functions without values. Simplified, this method is used to filter out all the items that do not match the selected criteria set by the developers. The standards matches will be returned.

Q47. What is the difference between bind() and live() function in jQuery?

The live() method works for future matching and existing elements, whereas the bind() method works with the components of the attached event that match or exist the selector at the time of the call.

Q48. Why we use jQuery .each() function?

The .each() function in jQuery is used by developers to iterate over both arrays and objects seamlessly. Where arrays and array-like objects with a length property are iterated by numeric index, other objects are iterated with their named properties.

Q49. What is the difference between prop() and attr() in jQuery?

The prop() method is used to change properties for HTML tag as per the DOM tree, whereas attr() changes attributes for HTML tags.

Q50. What is the difference between jQuery and JavaScript?

JavaScript is a scripting language used on browser or server side. jQuery is a library for JavaScript. You can write code in JavaScript without needing jQuery, but you can’t write code in jQuery without JavaScript.

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.

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