DEA-C01 Data Ingestion and Transformation Practice Question

Correct answer & explanation

The application uses a single KCL worker to process all 2 shards, which processes records sequentially and causes high latency. Deploying multiple KCL workers (ideally one per shard) enables parallel processing of shards, significantly reducing latency. Option A is incorrect because increasing shard count to 4 adds more capacity but does not address the bottleneck of a single worker; the same worker would process all 4 shards sequentially, potentially worsening latency. Option C is incorrect because Kinesis Data Streams is a managed service; there is no instance type to change for the stream itself. The KCL worker runs on your compute resources, not on the stream. Option D is incorrect because decreasing shards to 1 reduces the level of parallelism, increasing the workload per shard and likely increasing latency further.