Which service helps automate workload monitoring and automatic capacity adjustment for databases?

• A. Amazon DynamoDB
• B. Amazon Aurora Serverless
• C. Amazon RDS
• D. Amazon ElastiCache

Answer: (B)

Automated capacity management for a database means the service can adjust compute resources on the fly without manual intervention, based on actual workload.

Aurora Serverless is designed for this. It automatically starts up, shuts down, and scales the database compute capacity (ACUs) in response to traffic, so you don’t have to provision or manage servers for varying workloads. This makes it ideal for apps with unpredictable or intermittent demand and for cost efficiency since you pay only for the capacity you use.

Other services don’t provide this same serverless, automatic scaling experience for a relational database: DynamoDB is a NoSQL database with its own scaling model, ElastiCache is a caching layer rather than primary data storage, and traditional RDS requires manual scaling of instance types rather than automatic capacity adjustments for the primary database.