What is black-box testing focused on?

Black-box testing is primarily focused on evaluating software based on its outputs in relation to various given inputs, without any knowledge of the internal workings or code of the application. This approach allows testers to assess system functionality, performance, and behavior from the user's perspective.

Testers provide specific inputs to the software and observe the resulting outputs to determine if the application behaves as expected. This type of testing helps identify discrepancies, confirm requirements, and ensure that the software delivers the intended user experience, making it essential for validating that the software meets its design specifications and functional requirements.

The other methods mentioned do not directly capture the essence of black-box testing. Random input generation is a tactic sometimes employed within black-box testing, but it does not define the method itself. Code review pertains to examining source code for quality and maintainability, while debugging involves identifying and resolving bugs in the code. None of these focus specifically on assessing the software based purely on its inputs and outputs without considering the underlying implementation.