A Company Is Running an Email Application Across Multiple AWS

question 71

Multiple Choice

A company is running an email application across multiple AWS Regions. The company uses Ohio (us-east-2) as the primary Region and Northern Virginia (us-east-1) as the Disaster Recovery (DR) Region. The data is continuously replicated from the primary Region to the DR Region by a single instance on the public subnet in both Regions. The replication messages between the Regions have a significant backlog during certain times of the day. The backlog clears on its own after a short time, but it affects the application's RPO. Which of the following solutions should help remediate this performance problem? (Choose two.)

• A) Increase the size of the instances.
• B) Have the instance in the primary Region write the data to an Amazon SQS queue in the primary Region instead, and have the instance in the DR Region poll from this queue.
• C) Use multiple instances on the primary and DR Regions to send and receive the replication data.
• D) Change the DR Region to Oregon (us-west-2) instead of the current DR Region.
• E) Attach an additional elastic network interface to each of the instances in both Regions and set up load balancing between the network interfaces.

---

Definitions:

Derived Demand

Derived demand refers to the demand for a good or service that arises from the demand for another good or service it produces or contributes to.

Labor Service

The work performed by employees for employers, contributing to the production of goods or the provision of services in exchange for wages.

MRP = MRC Rule

The principle that to maximize profit (or minimize losses), a firm should employ the quantity of a resource at which its marginal revenue product (MRP) is equal to its marginal resource cost (MRC), the latter being the wage rate in a purely competitive labor market.

Profit-maximizing Firm

A company that adjusts its production and sales levels to achieve the highest possible profit based on its cost structure and market price.