Final answer:
Black box testing is a software testing technique that focuses on testing the functionality and behavior of the software without knowing its internal structure.
Step-by-step explanation:
Black box testing focuses on testing the functionality and behavior of the software from an external perspective.
In black box testing, the tester treats the software as a black box and inputs various test inputs to observe the output and verify if it matches the expected results.
The objective is to identify any bugs, errors, or missing functionality without needing to know the internal implementation details of the software.
For example, in black box testing of a website, the tester would interact with the website's user interface, input different values in the forms, click on buttons, and observe the responses to ensure that the website's functionality is working correctly.