Now a days, JSON has become a hot topic. Developers today are really getting interesting in JSON. So, in this post I am going to explain what is JSON. JSON : JavaScript Object Notation  is a technology / format to store the data in key - value pairs i.e. the large amount of data can be stored / transmit using a JSON. Like for example : For a php developer, it is common to create the AJAX backend page and to send the data back to main page. Previously it was kind of tedious as user needs to create an array and needs to handle everything by himself / herself. But with JSON, it becomes very easy. JUST CREATE A JSON OBJECT containing the data, pass it to main page and use it.. simple. and this is just a very basic example. JSON is widely used in all Documents-Oriented Databases (like MongoDB[http://learnandsharetoall.blogspot.in/2014/01/what-is-mongodb.html], Hadoop, NoSQL etc.). So JSON's application is very very much extended. Now to understand JSON, lets divide it in ...