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.

---

Definitions:

EBIT

Stands for Earnings Before Interest and Taxes, a measure of a firm's profitability that excludes interest and income tax expenses.

Cost of Goods Sold

The immediate financial outlays involved in the manufacture of goods a company sells, such as labor and material expenses.

Price-Earnings Ratio

A valuation metric that compares a company's share price to its earnings per share.

Market-to-Book Ratio

The market-to-book ratio compares a company's market value (or capitalization) to its book value of equity, indicating how valued a company is in comparison to its accounting values.