Define the terms "blue" and "green" deployments.

1.	Define the terms "blue" and "green" deployments.
Answer» The Blue/Green DEPLOYMENT approach reduces the time it takes to complete a deployment transfer by ENSURING that TWO versions of the application STACKS are available at the same time. We can leverage service and routing tiers to SEAMLESSLY swap between two running application stacks. As a result, performing a rollback is simple and rapid.

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