A Developer Has an E-Commerce API Hosted on Amazon ECS

question 153

Multiple Choice

A Developer has an e-commerce API hosted on Amazon ECS. Variable and spiking demand on the application is causing order processing to take too long. The application processes Amazon SQS queues. The ApproximateNumberOfMessagesVisible metric spikes at very high values throughout the day, which cause Amazon CloudWatch alarm breaches. Other ECS metrics for the API containers are well within limits. What can the Developer implement to improve performance while keeping costs low?

• A) Target tracking scaling policy
• B) Docker Swarm
• C) Service scheduler
• D) Step scaling policy

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Definitions:

External Costs

Costs that are not borne by the parties involved in an economic transaction but are imposed on other individuals or society at large, such as pollution or congestion.

Coase Theorem

A principle suggesting that if transaction costs are low, private bargains will efficiently resolve the allocation of resources and distribution of goods.

Zoning Ordinance

Legislation that divides an area into zones to specify allowable land uses and regulate building standards, to shape urban growth and land use.

Socially Optimal

A situation in which resources are allocated in the most efficient manner from the perspective of society as a whole.