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Introduction to JSON

Profile picture for user devraj
Written by devraj on 11/21/2021 - 00:57

If your Job profile is Developer, QA or Data Scientist or any other related field, you might have heard the term "JSON (Jason or Jay-Sawn)", and if you’re a fresher, you might be little confused if you have not came across this term during your school or college. 

JSON stands for JavaScript Object Notation, which is basically a text-based data exchange format derived from JavaScript. We use JSON to store and transport data. JSON is widely used format available for use by many languages including Python, Ruby, PHP, and Java since the format is text only.

JSON is often used as a common format to serialize and deserialize data in applications that communicate with each other over the Internet.

Key points about JSON

  1. The JSON format was originally specified by Douglas Crockford, and is described in RFC 4627. 
  2. It is based on a subset of the JavaScript Programming Language Standard ECMA-262, 3rd Edition - December 1999.
  3. The official Internet media type for JSON is application/json.
  4. JSON uses the .json extension when it stands alone.
  5. RESTful web services use JSON extensively as the format for the data inside requests and responses. 
  6. JSON is self-describing and easy to understand
  7. JSON is a lightweight data-interchange format
  8. JSON is language independent 
  9. JSON is easy to read and write than XML.
  10. JSON supports array, object, string, number, boolean and null.

Example 

{
   "firstName": "Ram",
   "lastName": "Sharma",
   "age": 26,
   "phoneNumbers": [
      { "Mobile": "909-909-9090" },
      { "Home": "101-101-1010" }
   ]
}

JSON store data in Key-value pairs. You may call it simple, nested and JSON with arrays but JSON defines only two data structures: objects and arrays. An object is a set of name-value pairs, and an array is a list of values. We will discuss about JSON Syntax in upcoming tutorial.

Related Content
REST Assured Tutorial
JSON Syntax
The Mobile JSON Wire Protocol
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