AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question

DynamoDB on-demand capacity mode adapts instantly to traffic changes and can accommodate thousands of requests per second without prior capacity planning. Because it automatically tracks and serves traffic based on the previous high-water mark, it prevents throttling during sudden spikes while scaling back during normal periods, eliminating manual intervention. Raising the maximum auto-scaling limits still incurs the several-minute ramp-up delay inherent to auto scaling, so short-lived spikes may continue to throttle. Adding a global secondary index with the same keys doubles write capacity consumption and does not address the underlying provisioning issue. Enabling DAX improves read latency and off-loads eventually consistent reads, but it does not help with write throttling, so traffic surges would still be limited by write throughput. Therefore, switching the table to on-demand capacity mode is the most effective and operationally simple choice.