functional and non-functional testing

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Functional and Non-functional Testing

Functional Testing :  
● Functional testing ​ is the type of testing done against the business requirements of the application.
● It is a black box type of testing.
● Preparation of test data based on the client requirement.
● Functional testing is a type of testing which verifies that each function of the software application operates in conformance with the requirement specification.
● Based on client requirement find out of the output of the functions.
● This testing involves checking of User Interface, APIs, Database, security.
● Functional testing describes what the product does. 

Non- functional Testing:  
● Non-Functional Testing is the type of testing done against the non-functional requirements.
● Non-functional requirements tend to be those that reflect the quality of the product.
● It can be started after the completion of Functional Testing.
● .non functional testing which is related to performance, scalability or behavior of the application under certain constraints.
● Non-functional testing describes how good the product works.

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