A Company Has a Legacy Application Running on AWS

question 263

Multiple Choice

A company has a legacy application running on AWS. The application can only run on one Amazon EC2 instance at a time. Application metadata is stored in Amazon S3 and must be retrieved if the instance is restarted. The instance should be automatically restarted or relaunched if performance degrades. Which solution will satisfy these requirements?

• A) Create an Amazon CloudWatch alarm to monitor the EC2 instance. When the StatusCheckFailed system alarm is triggered, use the recover action to stop and start the instance. Use a trigger in Amazon S3 to push the metadata to the instance when it is back up and running.
• B) Use the auto healing feature in AWS OpsWorks to stop and start the EC2 instance. Use a lifecycle event in OpsWorks to pull the data from Amazon S3 and update it on the instance.
• C) Use the Auto Recovery feature in Amazon EC2 to automatically stop and start the EC2 instance in case of a failure. Use a trigger in Amazon S3 to push the metadata to the instance when it is back up and running.
• D) Use AWS CloudFormation to create an EC2 instance that includes the user-data property for the EC2 resource. Add a command in user-data to retrieve the application metadata from Amazon S3.

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Definitions:

Sons of Liberty

A secret revolutionary organization that was formed by American Patriots in the Thirteen Colonies to oppose British policies before the American Revolution.

Samuel Adams

A Founding Father of the United States known for his leadership in the American Revolution, particularly in Massachusetts, and a key figure in organizing the Boston Tea Party.

Boston's Resistance

Refers to the series of events and acts of opposition by inhabitants of Boston, Massachusetts, against British authority leading up to the American Revolutionary War.

Colonial Delegates

Representatives from the American colonies who participated in assemblies and congresses prior to the United States' independence.