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Understanding the Difference Between Functional Testing and Non-Functional Testing

When it comes to software testing, the distinction between functional testing and non-functional testing is crucial. Functional testing verifies that the software behaves as expected in terms of specific functions, while non-functional testing evaluates the performance and characteristics of the software.

Example of Functional Testing:

One example of functional testing would be testing the login functionality of a website. This involves checking if users can successfully log in using valid credentials and are denied access with invalid ones.

Example of Non-Functional Testing:

In contrast, non-functional testing focuses on aspects like usability, security, and performance. An example of non-functional testing is testing the response time of a website under different load conditions to ensure it meets performance requirements.

In summary, while functional testing validates specific features and functions of the software, non-functional testing examines broader aspects like performance, usability, and security.

By understanding the differences between functional and non-functional testing, software testers can ensure that the software meets both functional requirements and user expectations.

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