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:

Fixed Exchange Rates

A currency system where the value of a currency is set at a predetermined rate relative to other currencies, instead of fluctuating in the open market.

Exchange Controls

Restrictions that a government may impose over the quantity of foreign currency demand by its citizens and firms and over the rate of exchange as a way to limit the nation’s quantity of outpayments relative to its quantity of inpayments (in order to eliminate a payments deficit).

Flexible Exchange Rates

Foreign exchange system where the value of currencies is determined by supply and demand in the forex market, without direct government intervention.

Services Trade

The exchange of services between countries, including sectors such as finance, insurance, transport, and tourism.