During the testing phase of the software change control process, which type of testing ensures that recent code changes have not adversely affected existing functionalities?
Beta testing
Unit testing
Regression testing
Integration testing
Regression testing is performed to confirm that new code changes do not negatively impact the existing features of the software. It helps maintain software quality by re-running functional and non-functional tests to ensure that previously developed and tested software still performs after changes. Unit testing checks individual components in isolation, integration testing examines the interactions between components, and beta testing involves user testing in a real-world environment before final release.
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