CompTIA Cloud+ (CV0-002) — Question 176

An administrator needs to deploy a new release of an application in a way that allows a quick rollback to the previous version of the application. Which of the following is the BEST strategy to apply?

Answer options

• A. Deploy the application to a set of servers in small batches. If a rollback is necessary, restore the previous deployment from snapshots or backups.
• B. Deploy the application to a subset of servers that expose the new application. Direct all traffic to these servers. If a rollback is necessary, redirect all traffic to the previous subset of servers.
• C. Deploy the application to the servers in a backup datacenter or secondary cloud deployment. Shut down the servers in the primary datacenter, forcing all traffic to the failover location. If a rollback is necessary, restart the primary environment and shut down the secondary environment.
• D. Deploy the application to all servers in the datacenter or cloud environment. If a rollback is necessary, undeploy the application and deploy the previous version.

Correct answer: D

Explanation

Answer D is correct because deploying to all servers allows for a straightforward undeployment and redeployment of the previous version, ensuring minimal downtime. The other options involve more complex rollback strategies that may not be as efficient or quick as simply undeploying and redeploying the application.