A Company Has a Complex Web Application That Leverages Amazon

question 560

Multiple Choice

A company has a complex web application that leverages Amazon CloudFront for global scalability and performance. Over time, users report that the web application is slowing down. The company's operations team reports that the CloudFront cache hit ratio has been dropping steadily. The cache metrics report indicates that query strings on some URLs are inconsistently ordered and are specified sometimes in mixed-case letters and sometimes in lowercase letters. Which set of actions should the solutions architect take to increase the cache hit ratio as quickly possible?

• A) Deploy a Lambda@Edge function to sort parameters by name and force them to be lowercase. Select the CloudFront viewer request trigger to invoke the function.
• B) Update the CloudFront distribution to disable caching based on query string parameters.
• C) Deploy a reverse proxy after the load balancer to post process the emitted URLs in the application to force the URL strings to be lowercase.
• D) Update the CloudFront distribution to specify case-insensitive query string processing.

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Definitions:

Marginal Cost

The cost associated with producing an additional unit, emphasizing its role in decision-making.

Total Fixed Costs

The aggregate of all charges that stay fixed no matter the production level or output.

Average Total Cost

The total cost of producing a given output level divided by the quantity of output, including both fixed and variable costs.

Basketballs

Spherical balls used in the game of basketball, designed to bounce when thrown or dribbled on the court.