The Resources for a Business-Critical, Three-Tier Web Application Are Expressed

question 213

Multiple Choice

The resources for a business-critical, three-tier web application are expressed in a series of AWS CloudFormation templates. The application is using Amazon RDS for data and Amazon ElastiCache for session state. Users have reported degraded performance in the application. A DevOps Engineer notices that the T2 instance type is being used for the application tier and CPU usage is at 100% in Amazon CloudWatch. What process should the Engineer follow to restore operations with the LEAST amount of disruption to the end users?

• A) Write a new CloudFormation template to include Amazon CloudFront in the environment, launch the stack, and update the Amazon Route 53 A record
• B) Launch a new CloudFormation stack for the application tier using the M4 instance type, run acceptance tests against the new stack, and update the Amazon Route 53 A record
• C) Update the CloudFormation stack for the application tier using the T2 Unlimited option, run acceptance tests against the new stack, and update the Amazon Route 53 A record
• D) Launch a new CloudFormation stack for all tiers of the application in a different region, run acceptance tests against the new stack, and update the Amazon Route 53 A record

---

Definitions:

Striated Muscle

A type of muscle tissue that has repeating sarcomeres, giving it a striped appearance, and is typically involved in voluntary movements.

Tumor

Tissue that becomes an abnormal lump due to cells dividing more than necessary or not dying as they should.

Myositis

Inflammation of the muscles that can cause weakness and swelling.

Muscle Tissue

A tissue composed of cells or fibers, the function of which is to produce force and cause motion, either locomotion or movement within internal organs.