SAA-C03 Question #451: Real Exam Question with Answer & Explanation

Question

An ecommerce company hosts an analytics application on AWS. The company deployed the application to one AWS Region. The application generates 300 MB of data each month. The application stores the data in JSON format. The data must be accessible in milliseconds when needed. The company must retain the data for 30 days. The company requires a disaster recovery solution to back up the data. Which solution will meet this requirement?

Options

• ADeploy an Amazon OpenSearch Service cluster in the primary Region and in a second Region.
• BDeploy an Amazon S3 bucket in the primary Region and in a second Region. Enable versioning
• CDeploy an Amazon Aurora PostgreSQL global database. Configure cluster replication between
• DDeploy an Amazon RDS for PostgreSQL cluster in the same Region where the application is

Explanation

Amazon S3 is designed for durability, scalability, and millisecond access. For small monthly data volumes (300 MB), S3 Standard is cost-effective and provides immediate access. To meet 30- day retention, Lifecycle policies can automatically expire objects after the required time. For disaster recovery, S3 Cross-Region Replication (CRR) copies objects across Regions to a backup bucket, ensuring data resiliency. OpenSearch (A) is not needed because the requirement is storage and retrieval, not indexing. Aurora or RDS options (C, D) add unnecessary complexity and cost, as a relational database is not required for JSON storage and millisecond retrieval. Therefore, option B provides the simplest, most resilient, and cost-optimized solution.

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