Your Company Hosts a Social Media Site Supporting Users in Multiple

question 385

Multiple Choice

Your company hosts a social media site supporting users in multiple countries. You have been asked to provide a highly available design tor the application that leverages multiple regions tor the most recently accessed content and latency sensitive portions of the wet) site The most latency sensitive component of the application involves reading user preferences to support web site personalization and ad selection. In addition to running your application in multiple regions, which option will support this application's requirements?

• A) Serve user content from S3. CloudFront and use Route53 latency-based routing between ELBs in each region Retrieve user preferences from a local DynamoDB table in each region and leverage SQS to capture changes to user preferences with SOS workers for propagating updates to each table.
• B) Use the S3 Copy API to copy recently accessed content to multiple regions and serve user content from S3. CloudFront with dynamic content and an ELB in each region Retrieve user preferences from an ElasticCache cluster in each region and leverage SNS notifications to propagate user preference changes to a worker node in each region.
• C) Use the S3 Copy API to copy recently accessed content to multiple regions and serve user content from S3 CloudFront and Route53 latency-based routing Between ELBs In each region Retrieve user preferences from a DynamoDB table and leverage SQS to capture changes to user preferences with SOS workers for propagating DynamoDB updates.
• D) Serve user content from S3. CloudFront with dynamic content, and an ELB in each region Retrieve user preferences from an ElastiCache cluster in each region and leverage Simple Workflow (SWF) to manage the propagation of user preferences from a centralized OB to each ElastiCache cluster.

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Definitions:

Outstanding Shares

The total number of shares of a corporation that have been issued and are currently held by investors, including public shareholders and company officers.

Dividends Paid

The portion of a company's earnings that is distributed to its shareholders as a return on their investment.

Investment Account

An account held at a financial institution which allows an individual to deposit funds and make investments in securities and other assets.

Debit/Credit

Fundamental aspects of all accounting transactions, where debits are entries on the left side, and credits are entries on the right side, used to record business transactions in the ledger.