AWS Certified DevOps Engineer – Professional (DOP-C02) — Question 259

A company has deployed an application in a single AWS Region. The application backend uses Amazon DynamoDB tables and Amazon S3 buckets.

The company wants to deploy the application in a secondary Region. The company must ensure that the data in the DynamoDB tables and the S3 buckets persists across both Regions. The data must also immediately propagate across Regions.

Which solution will meet these requirements with the MOST operational efficiency?

Answer options

• A. Implement two-way S3 bucket replication between the primary Region's S3 buckets and the secondary Region’s S3 buckets. Convert the DynamoDB tables into global tables. Set the secondary Region as the additional Region.
• B. Implement S3 Batch Operations copy jobs between the primary Region and the secondary Region for all S3 buckets. Convert the DynamoDB tables into global tables. Set the secondary Region as the additional Region.
• C. Implement two-way S3 bucket replication between the primary Region's S3 buckets and the secondary Region's S3 buckets. Enable DynamoDB streams on the DynamoDB tables in both Regions. In each Region, create an AWS Lambda function that subscribes to the DynamoDB streams. Configure the Lambda function to copy new records to the DynamoDB tables in the other Region.
• D. Implement S3 Batch Operations copy jobs between the primary Region and the secondary Region for all S3 buckets. Enable DynamoDB streams on the DynamoDB tables in both Regions. In each Region, create an AWS Lambda function that subscribes to the DynamoDB streams. Configure the Lambda function to copy new records to the DynamoDB tables in the other Region.

Correct answer: A

Explanation

Option A is correct because it provides a straightforward and efficient way to ensure data consistency across Regions by using S3 bucket replication and global tables for DynamoDB. The other options involve additional complexity and operational overhead, such as using Lambda functions and DynamoDB streams, which are not necessary when global tables can handle cross-region replication effectively.