DEA-C01 Data Operations and Support Practice Question

Correct answer & explanation

Increasing the number of shards in a Kinesis data stream increases the level of parallelism for both ingestion and consumption, allowing the consumer to process more data concurrently and catch up. Option A is incorrect because Kinesis Data Firehose is a delivery stream, not a replacement for real-time consumption, and cannot solve a consumer lag issue. Option B is incorrect because decreasing batch size reduces the amount of data processed per poll, which can actually slow down throughput and increase iterator age. Option C is incorrect because enhanced fan-out is useful when multiple consumers need dedicated throughput, but it does not increase the total throughput of the stream; it simply provides each consumer with its own 2 MB/sec per shard read throughput, which may not help a single consumer that is already falling behind.