Your Application Currently Leverages AWS Auto Scaling to Grow and Shrink

question 822

Multiple Choice

Your application currently leverages AWS Auto Scaling to grow and shrink as load Increases/ decreases and has been performing well. Your marketing team expects a steady ramp up in traffic to follow an upcoming campaign that will result in a 20x growth in traffic over 4 weeks. Your forecast for the approximate number of Amazon EC2 instances necessary to meet the peak demand is 175. What should you do to avoid potential service disruptions during the ramp up in traffic?

• A) Ensure that you have pre-allocated 175 Elastic IP addresses so that each server will be able to obtain one as it launches
• B) Check the service limits in Trusted Advisor and adjust as necessary so the forecasted count remains within limits.
• C) Change your Auto Scaling configuration to set a desired capacity of 175 prior to the launch of the marketing campaign
• D) Pre-warm your Elastic Load Balancer to match the requests per second anticipated during peak demand prior to the marketing campaign

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Definitions:

Degrees of Freedom

The count of individual values or magnitudes that may be allocated to a statistical distribution without breaking any limitations.

Sample Size

The number of observations or individuals taken from a population to form a sample for the purpose of statistical analysis.

Variance Accounted

A measure of the proportion of the total variance in a dataset that is explained or accounted for by a statistical model or factor.

Correlation

A numerical indicator that reveals the degree to which two factors vary in tandem, showcasing the intensity and orientation of their association.