DVA-C02 Question #523: Real Exam Question with Answer & Explanation

Question

A gaming company has deployed a web portal on AWS Elastic Beanstalk. The company sometimes needs to deploy new versions three or four times in a day. The company needs to deploy new features for all users as quickly as possible. The solution must minimize performance impact and must maximize availability. What solution will meet these requirements?

Options

• AUse a rolling deployment policy to deploy to Amazon EC2 instances.
• BUse an immutable deployment policy to deploy to Amazon EC2 instances.
• CUse an all-at-once deployment policy to deploy to Amazon EC2 instances.
• DUse a-canary deployment strategy to deploy changes to Amazon EC2 instances.

Explanation

A canary deployment gradually shifts a small percentage of traffic to the new version, allowing validation before a full rollout while maintaining availability for all users.

Common mistakes.

• A. A rolling deployment replaces instances in batches, temporarily reducing capacity and potentially degrading performance during the update window.
• B. An immutable deployment launches a full set of new instances before switching traffic, which maximizes availability but is slower and more resource-intensive, making it less suitable for multiple daily deployments.
• C. An all-at-once deployment updates all instances simultaneously, causing downtime and failing the availability requirement.

Concept tested. Elastic Beanstalk canary traffic-splitting deployment strategy

Reference. https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.deploy-existing-version.html

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