You Work for a Startup That Has Developed a New

question 381

Multiple Choice

You work for a startup that has developed a new photo-sharing application for mobile devices. Over recent months, your application has increased in popularity; this has resulted in a decrease in the performance of the application clue to the increased load. Your application has a two-tier architecture that is composed of an Auto Scaling PHP application tier and a MySQL RDS instance initially deployed with AWS CloudFormation. Your Auto Scaling group has a min value of 4 and a max value of 8. The desired capacity is now at 8 because of the high CPU utilization of the instances. After some analysis, you are confident that the performance issues stem from a constraint in CPU capacity, although memory utilization remains low. You therefore decide to move from the general-purpose M3 instances to the compute-optimized C3 instances. How would you deploy this change while minimizing any interruption to your end users?

• A) Sign into the AWS Management Console, copy the old launch configuration, and create a new launch configuration that specifies the C3 instances. Update the Auto Scaling group with the new launch configuration. Auto Scaling will then update the instance type of all running instances.
• B) Sign into the AWS Management Console, and update the existing launch configuration with the new C3 instance type. Add an UpdatePolicy attribute to your Auto Scaling group that specifies AutoScalingRollingUpdate.
• C) Update the launch configuration specified in the AWS CloudFormation template with the new C3 instance type. Run a stack update with the new template. Auto Scaling will then update the instances with the new instance type.
• D) Update the launch configuration specified in the AWS CloudFormation template with the new C3 instance type. Also add an UpdatePolicy attribute to your Auto Scaling group that specifies AutoScalingRollingUpdate. Run a stack update with the new template.

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Definitions:

Debt

An amount of money borrowed by one party from another, under the condition that it is to be paid back at a later date, often with interest.

Liquidity

The ease with which an asset can be converted into cash without significant loss in value.

Profitability

Measures how much profit a company generates in relation to its revenues, assets, or equity, indicating its financial health and efficiency.