Question

What is Black Box software testing?

• A. A type of Basis Path Testing technique
• B. Testing performed by the development team only
• C. Testing based on the internal code structure
• D. Testing without the knowledge of internal code implementation

Hint:

Think about which testing style treats the program as a sealed box and only checks inputs against expected outputs.

Answer 1

The Correct Option is D

Step 1: Black box testing checks a program against its specification. The tester only looks at inputs and the expected outputs.

Step 2: The tester does not see or use the source code, the control flow, or the internal logic. The software is treated like a sealed box.

Step 3: Option (A) is wrong because Basis Path Testing is a white box method. Option (C) describes white box testing, which uses the internal code structure. Option (B) is about who runs the test, not the technique.

Step 4: So black box testing is testing done without any knowledge of how the code is written inside.

Correct option: (D).