What is URI? What is the purpose of web-based service and what is it’s format?

URI stands for Uniform Resource Identifier. It is a string of characters designed for unambiguous identification of resources and extensibility by the URI scheme. The purpose of URI is to locate the resource on the server hosting of the web service.

What exactly needs to verify in API testing?

In API testing, we send a request to API with the known data and then analysis the response.

We will verify the accuracy of the data.
Will see the HTTP status code.
We will see the response time.
Error codes in case API returns any errors.
Authorization would be check.
Non-Functional testing such as performance testing, security testing.

What is API?

API (Application Programming Interface) helps in communication and data exchange between two software systems. API act as an interface between two applications and allows the two software systems communicate with one another. API is a collection of functions which can be executed by another software program.

API works as; it takes a request from the source, takes that request to the database, fetches the request data from the database and returns a response to the source. API takes the requests from the user and gives the response without exposing the internal details. API acts as Abstraction.

What is REST API?

REST API is a set of function helps the developers performing requests when the response is receiving. Through HTTP protocol interaction is made in REST API.

REST is defined as Representational state transfer. It is an effective standard for API creation.

What is API framework?

API framework is described by the config. File which consist of the list of all APIs that are required to be activated and are activated for any particular program run. This is essential as every test run does not require all APIs.

What are the characteristics of REST?

Here, are the two characteristics of REST.

REST is stateless. With the use of the REST API the server has no status, we can restart the server between two calls, inspite of all the data is transferred to the server.
Web Services uses POST method to perform operations, while REST uses GET method to access the resources.

What is messaging in RESTFUL Web Services?

RESTFUL Web Services use the HTTP protocol as a communication tool between the client and the server. This is the technique when the client sends a message in the form of HTTP request the server send back the HTTP reply which is called Messaging. This message consists message data and Meta data i.e. information on the message itself.

What is API documentation?

A good documentation is must for any foundation. API documentation serves as quick reference for accessing library or working within a program.

When we use any such documents, it must consists of proper plan, content source, proper layout, information related to each function etc.

There are various documentation tools like Doxygen and JavaDoc. Here, are the functions which are documented which revolve around the parameters like:

Function description
Type and syntax of error message that may occure
Syntax, elements and sequence needed for each parameter
Links regarding functions

What are SOAP Web Services?

SOAP (Simple Object Access Protocol) is defined as the XML based protocol. SOAP is also known for developing and designing web services and also enable the communication between the applications developed on different platform by using different programming languages on the internet. SOAP is platform and language independent.

What is API testing?

API testing is a type of software testing that involves testing APIs directly. API is a part of integration testing to check whether the API meets expectations in terms of functionality, reliability, performance, and security of applications. Multiple API system can performed API testing. In API testing, our primary focus is on Business Logic Layer of the software architecture.