To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) A regression test will help ensure unchanged areas of software have not been affected. - This option is correct. Regression testing is a type of software testing that is performed to ensure that changes or updates to a software application have not affected previously tested functionalities. By running a regression test, we can verify that unchanged areas of the software have not been impacted by the changes made.
Option B) A regression test will help ensure changed areas of software have not been affected. - This option is incorrect. Regression testing focuses on unchanged areas of the software to ensure they have not been affected. It does not specifically test the changed areas.
Option C) A regression test can run during user acceptance testing only. - This option is incorrect. Regression testing can be performed at various stages of the software development lifecycle, including during user acceptance testing, but it is not limited to this phase alone. It can also be conducted during integration testing, system testing, or even during maintenance activities.
Option D) A regression test will always be automated. - This option is incorrect. While regression testing can be automated, it does not have to be. Regression testing can be performed manually or using automated tools, depending on the complexity of the software and the available resources.
The correct answer is A) A regression test will help ensure unchanged areas of software have not been affected. This option is correct because regression testing is specifically designed to check that unchanged parts of the software have not been impacted by changes made elsewhere.