In Black Box Testing, which of the following is the primary focus?

Black Box Testing focuses on testing the functionality of a software application based on the requirements and specifications, without knowing the internal code structure or logic. The primary goal is to ensure that the application behaves as expected from the user's perspective. The tester provides inputs and examines outputs without any knowledge of how the system processes the input internally. This type of testing is often conducted by testers who are separate from the development team and relies on functional requirements to validate correctness. Black Box Testing is essential because it reflects the real-world use of the application, ensuring that the end product meets the user’s expectations and requirements. It covers a range of tests such as functional testing, acceptance testing, and system testing. Why Other Options Are Wrong: A) Code Coverage: This is associated with White Box Testing, where the focus is on covering as many paths of the code as possible. B) Internal Logic: Internal logic is tested in White Box Testing, not Black Box Testing, where the emphasis is on external behavior rather than code internals. D) Performance under load: This is related to Performance Testing, which examines how the system behaves under heavy loads, rather than functional correctness. E) Integration of modules: This is tested during Integration Testing, where the interaction between different modules is validated rather than individual functionalities based on user requirements.