Which deployment method updates servers in successive waves to minimize impact?

• A. Canary deployment
• B. Rolling deployment
• C. Hotfix
• D. Rollback

Answer: (B)

Rolling deployment gradually updates servers in successive groups across the fleet. After each group, you check health and performance before moving to the next, so any issues affect only a portion of the system and can be contained quickly. This minimizes risk and downtime because you can stop the process and roll back if problems appear. A hotfix is an urgent patch to fix a bug; a rollback undoes a previous deployment; while a canary deployment starts with a very small subset to observe behavior before broader rollout, the approach described—updating in waves across the whole fleet—is best captured by rolling deployment.