AWS Certified Data Engineer Associate DEA-C01 Practice Question

Switching the stream to on-demand capacity mode removes the fixed per-shard limits that cause ProvisionedThroughputExceededException errors. Kinesis Data Streams On-Demand automatically scales write throughput in response to traffic spikes, so producers no longer experience throttling and the operations team does not need to monitor or manually reshard the stream. Simply increasing the shard count and attaching Application Auto Scaling policies would still require monitoring and periodic resharding. Enhanced fan-out affects only consumer throughput, not write capacity. Reducing the number of partition keys or changing the partition-key algorithm would require producer modifications, which are not allowed.