Top 20 jQuery Interview Questions and Answers

Latest Top 20 jQuery Interview Questions and Answers:

Some jQuery Interview Questions and Answers given as bellow-

jQuery:-

jQuery is a very popular JavaScript library that has been widely use in web application development. It is most popular web application framework. jQuery is lightweight code which is based on the client-side library. Without refresh page, if you want to add some functionality in web application we need to jQuery. For Example –

$(document).ready(function(){
//write code here
});

Question 1 – Why do you use jQuery in web application development?
Answer – Some advantages of jQuery given as bellow –

• Lightweight code
• Easy to learn and use
• Client-side library
• Very fast
• It is very easy to use for DOM manipulation
• Add AJAX functionality
• Add function for applying CSS
• It is easy to detection of error etc.

Question 2 – jQuery is client scripting or server-side scripting?
Answer – jQuery is a Client-Side scripting language.

Question 3 – What is the primary need to start jQuery code?
Answer – Before starting jQuery programming, first you need to add latest version of jQuery library file in your program.

Question 4 – What is mean the dollar sign ($) in jQuery?
Answer – The dollor sign ( $ ) is nothing but an identifier of jQuery functions. A dollor sign ( $ ) defines jQuery selector. We can also use jQuery instead of writing $ dollor sign.

Question 5 – What is the full form of CDN?
Answer – The full form of CDN is Content Delivery Network or Content Distribution Network.

Question 6 – What are the advantages of using CDN?
Answer – Advantages of CDN given as bellow –

• CDN reduces the load from the server.
• CDN saves bandwidth.
• jQuery loads faster from the CDN and
• The most important advantage is it will be cached.

Question 7 – Why are we use ID selector in jQuery?
Answer – ID is the fastest selector in jQuery.

Question 8 – Please give an example of button click event in jQuery?
Answer – The example is given bellow-

$(document).ready(function(){
$("#ButtonId").click(function(){
alert("Hello");
});
});

Question 9 – Define the jQuery selectors?
Answer – jQuery selectors allow us to select & manipulate HTML elements. jQuery selectors are used to find the HTML elements based on id, name, classes, attributes and much more.

Question 10 – What is full form of DOM?
Answer – DOM stands for Document Object Model.

Top 20 jQuery Interview Questions and Answers