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What action is taken to revert changes after a patch deployment if issues arise?

Rollback
Uninstall
Reset
Reconfigure

The correct answer is: Rollback

The action taken to revert changes after a patch deployment if issues arise is often referred to as a rollback. This process involves reverting the system back to its previous state prior to the application of the patch, effectively undoing any modifications that the patch introduced. Rollbacks are a critical part of patch management, as they provide a safety net to mitigate any unintended consequences that may occur post-deployment, such as system instability, software conflicts, or performance issues. This approach is especially vital in environments where system uptime and reliability are paramount. A rollback typically preserves the integrity of the system by restoring files, configurations, and settings to their prior state, ensuring that any issues caused by the patch do not impact overall operational efficiency. In contrast, uninstalling a patch might completely remove the software, which could lead to further complications if that software is integral to system functionality. Resetting typically refers to returning a system to factory settings or a specific point, which may erase data and configurations not directly related to the patch. Reconfiguring can involve manual adjustments to settings and may not completely revert the changes made by the patch, thus not providing a full safety net like a rollback does.