5.1 Advising Development and Operation Teams to Ensure the Successful Deployment of the Solution PROFESSIONAL-CLOUD-ARCHITECT Practice Questions (Page 7)

Questions 31–31

1. 31application · medium

   A company is migrating a legacy application from a single Compute Engine VM to a managed instance group. The application is stateless and uses an external load balancer. The team has completed the migration and is ready for cutover. They want to be able to roll back quickly if a critical issue is discovered after the cutover. What should the team do?

   • ARely on snapshots of the old VM to restore it if needed
   • BKeep the old VM running and update the DNS record to point to the new load balancer, and keep the old VM's IP address available
   • CDelete the old VM immediately after the cutover to save costs
   • DUse a blue/green deployment strategy with the load balancer, keeping the old instance group as the 'blue' environment
   Reveal Solution Discussion Select an answer first