AWS Certified Data Engineer Associate DEA-C01 Practice Question

Switching the table and any global secondary indexes to on-demand capacity mode removes the need to provision or scale capacity manually. DynamoDB automatically accommodates sudden traffic spikes (up to tens of thousands of requests per second) and charges only for the read and write requests actually made, eliminating throttling during peaks and cost during idle periods. Simply raising provisioned capacity or tweaking auto-scaling still incurs idle cost and requires tuning. DAX improves read latency but does not increase write throughput. DynamoDB Streams with Lambda off-loads data elsewhere but leaves the original write traffic and throttling issues unresolved.