AWS Certified DevOps Engineer – Professional — Question 96

A company must collect user consent to a privacy agreement. The company deploys an application in six AWS Regions: two Regions in North America, two Regions in Europe, and two Regions in Asia. The application has a user base of 20 million to 30 million users.

The company needs to read and write data that is related to each user's response. The company also must ensure that the responses are available in all six Regions.

Which solution will meet these requirements with the LOWEST latency of reads and writes?

Answer options

• A. Implement Amazon DocumentDB (with MongoDB compatibility) in each of the six Regions.
• B. Implement Amazon DynamoDB global tables in each of the six Regions.
• C. Implement Amazon ElastiCache for Redis replication groups in each of the six Regions.
• D. Implement Amazon Elasticsearch Service (Amazon ES) in each of the six Regions.

Correct answer: B

Explanation

The correct answer is B, as Amazon DynamoDB global tables allow for low-latency reads and writes across multiple AWS Regions, which is crucial given the geographic distribution of users. The other options, while capable of handling data, may not provide the same level of performance and consistency for cross-region access as DynamoDB global tables.