Differences Between Functional and Non-Functional Testing

Functional and non-functional testing are both crucial for ensuring the quality of software applications. Functional testing verifies that an application's features work as per defined specifications, while non-functional testing evaluates aspects like performance, scalability, reliability, and usability. Key types of functional testing include unit, integration, system, acceptance, and regression testing. Non-functional testing encompasses attributes such as usability, scalability, reliability, and performance, with common types being performance, usability, compatibility, and security testing. Functional testing focuses on the overall functionality of software, while non-functional testing emphasizes aspects like scalability, performance, security, usability, and reliability. Both approaches are important for delivering robust applications, but teams should prioritize both functional and non-functional testing to ensure overall quality.

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