Which testing phase is conducted at customer sites by the end-user?

• A. Alpha test
• B. Beta test
• C. Unit test
• D. System test

Answer: (B)

Beta testing is the phase where the product is released to real users in their own environments, often at customer sites, so they can use it as it will be used in production. This end-user feedback helps uncover issues that only show up in real-world conditions, such as actual workflows, performance with real data, and usability concerns. It follows internal testing and is distinct from alpha testing, which is done by internal staff in a controlled setting. Unit testing focuses on individual components in isolation, while system testing checks the complete product in a controlled environment to ensure it meets requirements. Because the scenario describes end-user testing at customer sites, beta testing is the best fit.