Which testing method is defined by executing the code and verifying the results?

Dynamic testing is the method defined by executing the code and verifying the results. This testing approach involves running the software to validate its functional aspects, ensuring that the program behaves as intended during execution. By conducting tests in a dynamic environment, testers can observe how the software interacts with inputs, produces outputs, and handles various scenarios, including error conditions.

In dynamic testing, the focus is on active evaluation—using test cases to uncover defects that may occur during normal operation or under stress. This method is essential for ensuring that the software meets both functional and non-functional requirements when it is in use.

Regarding the other options, static testing focuses on examining the code and documentation without executing the program. Usability testing evaluates how user-friendly and efficient a software application is, often involving user feedback and experience rather than direct code execution. Performance testing assesses how the system performs under various conditions but does not exclusively focus on verifying code execution outcomes; it includes load and stress testing aspects that do not necessarily involve checking result correctness from the code perspective.