Important Questions Answers on JQuery Interviews 2023 - TopInterviewQuestions

jQuery Library Introduction

JQuery is a fast, small, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, and animation much simpler with an easy-to-use API that works across a multitude of browsers. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript.

jQuery Basic Functionality Example

JQuery is a JavaScript library that makes it easier to work with the Document Object Model (DOM), handle events, create animations, and perform other common tasks on the client-side of web development.

An example of jQuery usage might be to add an event listener to a button element, so that when the button is clicked, an alert box appears with a message:

<button id="myButton">Click me</button> 
<script>
$(document).ready(function() { 
 $("#myButton").click(function() { 
   alert("Button was clicked"); 
    }); 
}); 
</script>

In this example, when the button with the id "myButton" is clicked, the anonymous function passed to the click() method will be invoked, which in turn displays an alert box with the message "Button was clicked".

This is a very basic example, jQuery offers a lot of functionality which can be used to create more interactive web pages, along with manipulating the DOM, making AJAX calls and more.

Use and benefit of jQuery

JQuery is a JavaScript library that is widely used to simplify client-side scripting in web development. It provides an easy-to-use API for handling common tasks such as selecting elements on a web page, manipulating the DOM, handling events, and making AJAX requests. It also abstracts away the differences in JavaScript behavior across different browsers, making it easier to write cross-browser-compatible code. Additionally, it provides a wide variety of built-in functions and plugins that can help developers accomplish more in less time and with less code.

There are several advantages to using jQuery in web development:

1. Simplified DOM Manipulation: jQuery provides a simple, consistent API for manipulating the Document Object Model (DOM), which is the structure of objects in a web page. This makes it easier to add, modify, and delete elements on a page, and to respond to events such as user interactions.
2. Cross-browser Compatibility: jQuery abstracts away many of the cross-browser inconsistencies that can occur when working with JavaScript, making it easier to write code that works the same in all modern browsers.
3. Easy Event Handling: jQuery provides an easy-to-use API for handling events, such as click events on buttons, hover events on images, and more.
4. AJAX Capabilities: jQuery provides a convenient API for making Asynchronous JavaScript and XML (AJAX) requests, which allows you to update parts of a web page without reloading the whole page.
5. Lightweight: jQuery is a lightweight library, it won't slow down the performance of your website.
6. Large Community Support: jQuery has a large and active community of developers who have created a wide variety of plugins and extensions that can be easily integrated into your website, allowing you to add new functionality without having to write it yourself.
7. A large number of plugins: Many pre-built plugins are available to help you in various tasks like form validation, carousel, modals, etc.
8. It's easy and simple: jquery API makes it very simple for the developer to understand and implement. It makes the code readable and less complex.

Take the best online MCQs Questions on Jquery

1) What is jQuery?

• A. a lightweight, "write less, do more", JavaScript library
• B. framework to "write less, do more",
• C. CMS to "write less, do more".
• D. JavaScript's competitor

2) What are the advantages of jQuery?

• A. Highly extensible
• B. SEO-friendly
• C. Cross-browser compatibility
• D. All of the above

3) What is the main purpose of jQuery?

• A. It makes easier to use JavaScript on your website.
• B. Content management
• C. Both A and B
• D. None of the above

4) CDN stands for __.

• A. Content Delivery Network
• B. Class Delivery Network
• C. Content Data Network
• D. Content Delivery Node

5) The basic jQuery Syntax is:

• A. $(selector).action()
• B. $(action()).selector
• C. Both A and B
• D. None of the above

6) Which one of the following are valid selector in jQuery?

• A. Element Selector
• B. #id Selector
• C. .class Selector
• D. All of the above

7) Which of the following denotes the happening of an event?

• A. moving a mouse over an element
• B. selecting a radio button
• C. clicking on an element
• D. All of the above

8) With jQuery, you can hide and show HTML elements by using the __ and __ methods respectively.

• A. hide(), show()
• B. Hide(), Show()
• C. hides(), display()
• D. None of the above

9) Which of the following syntax is helpful to create a custom animations in jQuery?

• A. $(selector).animate({params},speed,callback);
• B. $(selector).animation({params},speed,callback);
• C. $(selector).animates({params},speed,callback);
• D. None of the above

10) Which of the following is an example of Chaining in jQuery?

• A. $("#p1").css("color", "red").slideUp(2000).slideDown(2000);
• B. $("button").click(function(){ alert($("#w3s").attr("href")); });
• C. Both A and B
• D. None of the above

View Answer 

Take the best website Interview Questions

Javatpoint

MCQPROF

Include help

Sanfoundry

AllTopInterview Questions

Thank you for visiting My blog