CompTIA Cloud+ (CV0-003) — Question 46

A systems administrator deployed a new application release to the green stack of a blue-green infrastructure model and made the green stack primary. Immediately afterward, users began reporting application issues. The systems administrator must take action to bring the service online as quickly as possible. Which of the following is the FASTEST way to restore the service?

Answer options

• A. Reboot all the servers in the green stack
• B. Failback to the blue stack
• C. Restore from backups
• D. Troubleshoot and resolve the application issues

Correct answer: B

Explanation

Failing back to the blue stack (option B) is the fastest way to restore service since it allows users to revert to the last known good version of the application without further delays. The other options either involve time-consuming processes such as troubleshooting (option D), rebooting servers (option A), or restoring backups (option C), which may take longer to execute than simply switching back to the blue stack.