A New Application Runs on Amazon EC2 Instances and Accesses

question 281

Multiple Choice

A new application runs on Amazon EC2 instances and accesses data in an Amazon RDS database instance. When fully deployed in production, the application fails. The database can be queried from a console on a bastion host. When looking at the web server logs, the following error is repeated multiple times: *** Error Establishing a Database Connection. Which of the following may be causes of the connectivity problems? (Choose two.)

• A) The security group for the database does not have the appropriate egress rule from the database to the web server.
• B) The certificate used by the web server is not trusted by the RDS instance.
• C) The security group for the database does not have the appropriate ingress rule from the web server to the database.
• D) The database is still being created and is not available for connectivity.

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Definitions:

Producer Surplus

The difference between the amount a producer is willing to accept for a good or service and the actual amount received, reflecting the benefit to producers from participating in the market.

Price Discrimination

A strategy where a firm sells the same product at different prices to different groups of consumers, often based on their willingness to pay.

Third-degree Price Discrimination

A pricing strategy where a seller charges different prices to different groups of consumers for the same product, based on attributes like age, location, or income.

Profit Maximizing Prices

Prices set by firms to maximize their profits, determined by the intersection of marginal cost and marginal revenue.