01. What is jQuery ?
Notes:
 What is jQuery? 
                                                jQuery is : 
                                                
                                                jQuery is one of the most popular, easy to learn, open source, cross browser, cross platform, JavaScript library. 
                                                
                                                Open source (free): 
                                                The original source code is freely available to read, understand, modify, use and extend according to user requirements.
                                                
                                                Cross browser (browser independent): 
                                                It works in almost all modern browsers like IE9, Google chrome, Firefox, Safari, Opera etc. 
                                                
                                                Cross platform (platform independent): 
                                                It works in almost all platforms like windows, Linux, Mac OS, Android etc. 
                                                
                                                JavaScript library (API: Application Program Interface): 
                                                It is written in JavaScript. 
                                                It is the collection of pre-written and reusable JavaScript objects, methods (functions), which we can use while designing web sites or developing web applications easily.
                                                
                                                jQuery website link: https://jquery.com/ 
                                                
                                        
Interview Questions:
