AWS Certified Solutions Architect – Professional (SAP-C02) — Question 204

An environmental company is deploying sensors in major cities throughout a country to measure air quality. The sensors connect to AWS IoT Core to ingest timeseries data readings. The company stores the data in Amazon DynamoDB.

For business continuity, the company must have the ability to ingest and store data in two AWS Regions.

Which solution will meet these requirements?

Answer options

• A. Create an Amazon Route 53 alias failover routing policy with values for AWS IoT Core data endpoints in both Regions Migrate data to Amazon Aurora global tables.
• B. Create a domain configuration for AWS IoT Core in each Region. Create an Amazon Route 53 latency-based routing policy. Use AWS IoT Core data endpoints in both Regions as values. Migrate the data to Amazon MemoryDB for Redis and configure cross-Region replication.
• C. Create a domain configuration for AWS IoT Core in each Region. Create an Amazon Route 53 health check that evaluates domain configuration health. Create a failover routing policy with values for the domain name from the AWS IoT Core domain configurations. Update the DynamoDB table to a global table.
• D. Create an Amazon Route 53 latency-based routing policy. Use AWS IoT Core data endpoints in both Regions as values. Configure DynamoDB streams and cross-Region data replication.

Correct answer: C

Explanation

Option C is correct because it establishes a robust failover mechanism using health checks and adjusts the DynamoDB table to a global table, ensuring data availability across Regions. Option A does not address data storage in DynamoDB properly, and option B suggests using MemoryDB, which does not meet the requirement of storing data in DynamoDB. Option D focuses on latency-based policies but lacks the necessary configuration for failover and global table setup.