Difference between Functional Testing and Non-Functional Testing

In software testing, Functional Testing focuses on testing the functionalities or features of a software system, ensuring that it performs as expected. It involves validating the system against functional requirements.

Non-Functional Testing, on the other hand, focuses on testing the non-functional aspects such as performance, usability, reliability, and scalability of the software system. It evaluates how the system behaves under different conditions beyond just its basic functions.

While Functional Testing verifies what the system should do, Non-Functional Testing evaluates how well the system performs in terms of speed, stability, and user experience.