Which deployment approach describes introducing a change to a limited subset of engines before full rollout?

• A. Staged rollout
• B. Full deployment
• C. Regression testing
• D. Documentation update

Answer: (A)

A staged rollout means introducing a change to a limited subset of engines before extending it to the entire fleet. This approach lets you monitor performance and catch issues in a controlled way, reducing risk and allowing a rollback or pause before wider deployment. Deploying to all engines at once would be a full deployment and carries more risk. Regression testing focuses on ensuring existing functionality still works after changes, not on how a deployment is rolled out. Documentation updates are about updating records, not deploying changes.