Can you explain the differences between white-box testing and black-box testing?

White-Box Testing vs Black-Box Testing: Understanding the Differences

During a QA Engineer interview, you may be asked to explain the distinctions between white-box testing and black-box testing. Let’s delve into the key differences:

White-Box Testing:

• Also known as clear box or glass box testing.
• Focuses on the internal logic and structure of the software being tested.
• Testers have access to the source code and use this information to design test cases.
• Tests are based on the application’s internal architecture, code paths, and data flows.
• Primary goal is to ensure code implementation is correct and to improve code quality.

Black-Box Testing:

• Also known as functional testing.
• Tests are based on external specifications and requirements, without knowledge of internal code.
• Testers approach the software as an end-user and evaluate its functionality, usability, and performance.
• Primary goal is to validate the application’s functionality against the specified requirements.
• Tests are focused on inputs, outputs, and error conditions without the need to know the internal workings of the system.

By understanding these differences, you can effectively apply the appropriate testing methodology to ensure the quality and reliability of the software under test.

For further insights and tips on excelling in QA Engineer interviews, feel free to explore our blog or reach out to our team of experts.