Which of the following best describes the Black-box technique?

The Black-box technique is best described as a method of testing that focuses on the inputs and outputs of a system or component without any knowledge of its internal workings. This approach allows testers to evaluate the functionality of the software by examining how it behaves in response to different inputs. Since the internal structure of the component or system is not taken into account, the testing is entirely based on the requirements and specifications.

This technique is often employed to verify that the software behaves as expected, ensuring that the user requirements are met. By concentrating solely on the observable behavior, testers can effectively assess the application's output against the specified requirements.

The other options refer to various white-box testing techniques that involve an in-depth understanding of the internal code structure, such as decision coverage and branch testing, which is contrary to the principle of black-box testing.