A Meteorological Startup Company Has a Custom Web Application to Sell

question 17

Multiple Choice

A meteorological startup company has a custom web application to sell weather data to its users online. The company uses Amazon DynamoDB to store its data and wants to build a new service that sends an alert to the managers of four internal teams every time a new weather event is recorded. The company does not want this new service to affect the performance of the current application. What should a solutions architect do to meet these requirements with the LEAST amount of operational overhead?

• A) Use DynamoDB transactions to write new event data to the table. Configure the transactions to notify internal teams.
• B) Have the current application publish a message to four Amazon Simple Notification Service (Amazon SNS) topics. Have each team subscribe to one topic.
• C) Enable Amazon DynamoDB Streams on the table. Use triggers to write to a single Amazon Simple Notification Service (Amazon SNS) topic to which the teams can subscribe.
• D) Add a custom attribute to each record to flag new items. Write a cron job that scans the table every minute for items that are new and notifies an Amazon Simple Queue Service (Amazon SQS) queue to which the teams can subscribe.

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Definitions:

Loss

The result when a company's expenses exceed its revenues during a specific period of time.

Expense

An outflow of money or other resources, incurred to generate revenue, which is recognized in the income statement.

Allowance for Doubtful Accounts

A contra-asset account that reduces the total receivables reported on the balance sheet to reflect the amount that is expected to be uncollectible.

Uncollectible Accounts

Accounts receivable that a company does not expect to collect due to customers' inability to pay.