The document discusses API testing using Postman, highlighting two types of APIs: SOAP and REST. It explains that while all web services are APIs, not all APIs are web services, with web services being APIs wrapped in HTTP. Additionally, it covers REST API requests, response parameters, HTTP status codes, and JSON data formatting and extraction methods.

1. API TESTING –
USING
POSTMAN
U P D AT E D V E R S I O N

2. application testing.
Eg: Customer ==> Waiter ==> Chef (Here Waiter acts as
an API)
Types of API:
------------
* There are two types of APIs:
1. SOAP API(Only supports xml format)
2. REST API (Supports multiple format like xml, json etc)
* We used a term "Web Services" for API . But, As soon as
the API is developed , tested and put into internet for
public to use, then it is called web services. So, its called
All the Web services are APIs But, APIs are not web
services.
* Web Service is an API wrapped in HTTP.
REST API/HTTPs Requests:
-----------------------
Types:
------
1. GET ==> Used to get the data/information from Server.
2. POST ==> Used to create the required data in the

3. -------------
* Pass Parameters are: URI and Request
payload(providing the body in JSON/HTML/XML format)
* Reponse Parameters : Response Payload(Response
Body), Status Code.
PUT Request:
-------------
* Pass Parameters are: URI and Request
payload(providing the body in JSON/HTML/XML format)
* Reponse Parameters : Response Payload(Response
Body), Status Code.
HTTP Status Code:
-----------------
*There are 3 levels of Status Code:
(i) Level 200
--------------
* This represents the successful requests.
200: OK
201: Created
202: Accepted
203: Non-Authoritative Information
204: No Content

4. * JSON is a text, written with Java Script Object notation.
* JSON is always in Key-Value Pairs. ("Key": Value)
JSON Data Types:
----------------
* Numbers,String, Boolean, Null, Object , Array
{
"name": "Som",==> String
"age" : 30, ==> number
"phone": [1234, 3445], ==> Array
"status": true ==> Boolean,
"SecondNAme": null
}
JSON Path:
----------
*By using JSON path, we will be able to extract a specific
data from the json file.
{
"students": [
{
"id": 1,
"name": "Som",
"location": "Salepur",
"phone": 1234567789,