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.

Q11. How we can get the value of a radio button using Jquery?

When a radio button is selected addition check attribute is not added to it. You have to enter "checked".


    $("input[type='button']").on('click', function(){
       var radioValue = $("input[name='gender']:checked").val();

Q12. How to redirect to another page using jQuery?

You can use window.location="https://www.bestinterviewquestion.com";

You can also use window.location.href = "https://www.bestinterviewquestion.com";

Q13. What is the difference between setTimeout() and setInterval() methods?
setTimeout() setInterval()
It runs the code with the timeout. This function executes the JavaScript statement "AFTER" interval. It runs the code in fixed time intervals depending upon the length of their timeout period.
setTimeout(expression, timeout); setInterval(expression, timeout);
Q14. How to create, read and delete cookies with jQuery?
1. Set a cookie

$.cookie("example", "foo"); // Sample 1
$.cookie("example", "foo", { expires: 7 }); // Sample 2
$.cookie("example", "foo", { path: '/admin', expires: 7 }); // Sample 3

2. Get a cookie

alert( $.cookie("example") );

3. Delete the cookie


Q15. What is parent() in jQuery?

parent() method refers to top-level elements in given HTML objects, usually selected by jQuery selector. Parent method is used to manipulate changes to be done at the top level of a nested HTML object.

Example: A paragraph which contains a couple of list elements can be a parent. Usually, Parent is used if there is an action based on the child element or if there is any specific need for a parent to be treated differently.


    $("span").parent().css({"display": "block", "border": "1px solid red"});

Q16. What is parseInt() and why it is used?

ParseInt() is a method in Java that is used to convert the numbers represented as a string. These numbers are an integer type, and through this method, the string gets converted to an integer.
ParseInt() is used to parse the string and returns it to an integer.


parseInt(string, radix)

Q17. How to submit a form without submit button using Jquery?

You have to develop the HTML form with adding jQuery. After writing some validation, proceed with the submission.

$("#bestinterviewquestion").submit(); // using jQuery
document.getElementById("bestinterviewquestion").submit(); // using JavaScript

Q18. How to validate email using jQuery?

By including @ and following the email naming standards, email can be validated using jQuery.


function validateEmail(sEmail) {
      var filter = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
      if (filter.test(sEmail)) {
          return true;
      } else {
          return false;

Q19. How to validate phone number using jQuery?

We can use regex ([0-9]{10})|(\([0-9]{3}\)\s+[0-9]{3}\-[0-9]{4})

Q20. How to check variable is empty or not in JQuery?
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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