Q62 — AWS DVA-C02 Ch.1

Question 62 of 100 | ← Chapter 1

A company deployed an application on AWS Elastic Beanstalk. The company configured the Auto Scaling group associated with the Elastic Beanstalk environment to maintain four Amazon EC2 instances. If fewer than four EC2 instances are available during deployment, the application may experience degradation. The company is using a rolling deployment policy. What is the most cost-effective solution to address this deployment issue?

• A. Change the Auto Scaling group to require six instances.
• B. Change the deployment policy to traffic splitting and specify a 1-hour evaluation period.
• C. Change the deployment policy to rolling with additional batches and specify a batch size of 1. ✓
• D. Change the deployment policy to rolling and specify a batch size of 2.

Correct Answer: C. Change the deployment policy to rolling with additional batches and specify a batch size of 1.

Explanation

Option A increases the number of running instances and incurs higher costs. Option B introduces unnecessary complexity for this scenario. Option D increases the risk of application performance degradation because it updates two instances simultaneously, reducing capacity to three instances — below the required four. Only option C remains viable.