A Company Wants to Run a Serverless Application on AWS

question 143

Multiple Choice

A company wants to run a serverless application on AWS. The company plans to provision its application in Docker containers running in an Amazon ECS cluster. The application requires a MySQL database and the company plans to use Amazon RDS. The company has documents that need to be accessed frequently for the first 3 months, and rarely after that. The document must be retained for 7 years. What is the MOST cost-effective solution to meet these requirements?

• A) Create an ECS cluster using On-Demand Instances. Provision the database and its read replicas in Amazon RDS using Spot Instances. Store the documents in an encrypted EBS volume, and create a cron job to delete the documents after 7 years.
• B) Create an ECS cluster using a fleet of Spot Instances, with Spot Instance draining enabled. Provision the database and its read replicas in Amazon RDS using Reserved Instances. Store the documents in a secured Amazon S3 bucket with a lifecycle policy to move the documents that are older than 3 months to Amazon S3 Glacier, then delete the documents from Amazon S3 Glacier that are more than 7 years old.
• C) Create an ECS cluster using On-Demand Instances. Provision the database and its read replicas in Amazon RDS using On-Demand Instances. Store the documents in Amazon EFS. Create a cron job to move the documents that are older than 3 months to Amazon S3 Glacier. Create an AWS Lambda function to delete the documents in S3 Glacier that are older than 7 years.
• D) Create an ECS cluster using a fleet of Spot Instances with Spot Instance draining enabled. Provision the database and its read replicas in Amazon RDS using On-Demand Instances. Store the documents in a secured Amazon S3 bucket with a lifecycle policy to move the documents that are older than 3 months to Amazon S3 Glacier, then delete the documents in Amazon S3 Glacier after 7 years.

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Definitions:

Budget Line

A graphical representation of all possible combinations of two goods that a consumer can purchase at given prices and within a fixed budget.

Money Income

The total amount of monetary earnings received by an individual or household, including wages, salaries, and other forms of income.

Alternative Combinations

Alternative combinations refer to different ways that resources can be allocated to produce varying outputs of goods and services in an economy.

Indifference Curve

A graphical representation showing combinations of two goods between which a consumer is indifferent, reflecting equal levels of utility.