Software Quality Assurance Practice Exam

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What is the purpose of regression testing?

To evaluate new functionality
To determine system performance
To ensure existing functionality remains unaffected
To test the user interface

The correct answer is: To ensure existing functionality remains unaffected

The purpose of regression testing is to ensure that existing functionality remains unaffected after changes, such as enhancements, patches, or configuration changes, have been made to the software. This type of testing helps to confirm that new code hasn't introduced any defects into previously working software systems. By re-running tests that were successful in the past, teams can identify any unintended side effects caused by updates, ensuring system stability and reliability. The other options relate to different aspects of software testing. Evaluating new functionality is typically done through functional or user acceptance testing, where the focus is on validating newly added features. Determining system performance involves performance testing, which assesses things like load handling and responsiveness, rather than changes to existing functions. Testing the user interface is a focused aspect that might be part of usability testing, aimed at ensuring that the user experience meets design specifications but does not directly relate to regression testing.