Black Box refers to a system that is treated as opaque, observed and understood solely in terms of its inputs and outputs, without any knowledge or consideration of its internal workings or structure. Key aspects include:
Focus:
- System inputs and outputs
- External behaviour
Tester Perspective:
- No knowledge of internal workings
- Acts like an end-user
Advantages:
- Unbiased testing
- Simulates real user experience
Limitations:
- May miss internal logic errors
- Can be less efficient for complex systems
Applications:
Black Box testing evaluates system behaviour without examining internal code.