AWS Certified Solutions Architect - Professional Practice Mode

Community Discussion

Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.

• Chose A1

  For applications with variable traffic, the on-demand capacity mode is the recommended default due to its operational simplicity. However, if you have a predictable, high-volume workload and want maximum cost efficiency, provisioned capacity with fine-tuned auto-scaling and potential reserved capacity purchases is a better choice. Based on the scenario mentioned in the question, option A makes more sense than B. C and D are ruled out as DAX is better for read-heavy, latency-sensitive applications

• Chose A1

  Use AWS Application Auto Scaling to scale provisioned capacity and purchase reserved capacity for the average load. Best for known, bursty pattern Most cost-efficient in the long term Slightly more setup effort but pays off

• Chose A1

  Reserved capacity applies to the baseline level of provisioned throughput. During peak workloads, Auto Scaling dynamically adjusts the provisioned capacity of a DynamoDB table (RCUs and WCUs) based on the actual workload. you are charged on-demand rates for the excess capacity.