CompTIA Project+ (PK0-005) — Question 8

Which of the following is a test that is done on an existing system to ensure the previous functionality still works after a change has been made?

Answer options

• A. Smoke testing
• B. Regression testing
• C. Unit testing
• D. User acceptance testing

Correct answer: B

Explanation

Regression testing is designed specifically to confirm that changes or updates have not adversely affected existing functionality. Smoke testing is more about initial checks for basic functionality, unit testing focuses on individual components, and user acceptance testing is conducted by end-users to validate the system meets their needs.