A DevOps Engineer Is Using AWS CodeDeploy Across a Fleet

question 132

Multiple Choice

A DevOps Engineer is using AWS CodeDeploy across a fleet of Amazon EC2 instances in an EC2 Auto Scaling group. The associated CodeDeploy deployment group, which is integrated with EC2 Auto Scaling, is configured to perform in-place deployments with CodeDeployDefault.OneAtATime . During an ongoing new deployment, the Engineer discovers that, although the overall deployment finished successfully, two out of five instances have the previous application revision deployed. The other three instances have the newest application revision. What is likely causing this issue?

• A) The two affected instances failed to fetch the new deployment.
• B) A failed AfterInstall lifecycle event hook caused the CodeDeploy agent to roll back to the previous version on the affected instances. A failed AfterInstall lifecycle event hook caused the CodeDeploy agent to roll back to the previous version on the affected instances.
• C) The CodeDeploy agent was not installed in two affected instances.
• D) EC2 Auto Scaling launched two new instances while the new deployment had not yet finished, causing the previous version to be deployed on the affected instances.

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Definitions:

Market Price

The current price at which an asset or service can be bought or sold in a particular market, determined by the supply and demand for it.

Average Revenue

The average amount of money received per unit of product or service sold, calculated by dividing total revenue by the number of units sold.

Marginal Revenue

The additional revenue that a firm receives from selling one more unit of a product or service.

Marginal Cost

The extra financial burden of manufacturing an additional unit of a product or service.