01. What is jQueryUI ?

Notes:

What is jQuery UI ?

UI: stands for User Interface. I.e. the front end of the website, where the user interacts

jQuery UI : is a jQuery & JavaScript library.
jQuery is a library built on top of JavaScript, hence jQuery is considered as a JavaScript library.
jQuery UI is a library built on top of jQuery and JavaScript, hence jQuery UI is considered as jQuery & JavaScript library.

Note: jQuery UI is built using JavaScript, jQuery and CSS; especially meant to enhance user interface of our websites.

Interview Questions: