What type of maintenance testing is conducted to prevent issues caused by software changes?

Regression testing is a critical type of maintenance testing conducted to ensure that recent changes to the software have not introduced new defects or issues. This form of testing re-executes previously completed tests, especially those relating to features that may have been affected by changes or enhancements in the code. By systematically verifying that existing functionality still operates as intended, regression testing helps to maintain software quality over time, especially after modifications such as bug fixes, updates, or new features.

This proactive approach prevents issues by identifying any unintended consequences of the changes made, thereby helping to ensure that the software remains reliable and functional for users. It's an essential part of the software development lifecycle, particularly in environments where the software is subject to continuous updates or changes.