Your Company Operates a Website for Promoters to Sell Tickets

question 436

Multiple Choice

Your company operates a website for promoters to sell tickets for entertainment events. You are using a load balancer in front of an Auto Scaling group of web servers. Promotion of popular events can cause surges of website visitors. During scaling-out at these times, newly launched instances are unable to complete configuration quickly enough, leading to user disappointment. What options should you choose to improve scaling yet minimize costs? (Choose two.)

• A) Create an AMI with the application pre-configured. Create a new Auto Scaling launch configuration using this new AMI, and configure the Auto Scaling group to launch with this AMI.
• B) Use Auto Scaling pre-warming to launch instances before they are required. Configure pre-warming to use the CPU trend CloudWatch metric for the group.
• C) Publish a custom CloudWatch memo from your application on the number of tickets sold, and create an Auto Scaling policy based on this.
• D) Use the history of past scaling events for similar event sales to predict future scaling requirements. Use the Auto Scaling scheduled scaling feature to vary the size of the fleet.
• E) Configure an Amazon S3 bucket for website hosting. Upload into the bucket an HTML holding page with its x-amz-website-redirect-location' metadata property set to the load balancer endpoint. Configure Elastic Load Balancing to redirect to the holding page when the load on web servers is above a certain level.

Calculate sales tax on transactions and understand its implications on sales and returns.

Prepare journal entries for cash and credit sales, including sales returns and allowances.

Record payment transactions, including discounts for early payment.

Know how to record the payment of sales tax to the state.

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Definitions:

Factor Analysis

A statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved variables, called factors.

Case Studies

In-depth investigations of a single person, group, event, or community over time to explore causation in order to find underlying principles.

High Correlation

A statistical measure indicating a strong relationship between two variables, where changes in one variable are closely linked to changes in the second.

Unconscious

Describes the part of the mind that is inaccessible to the conscious mind but that affects behaviors and feelings.