AWS Certified Data Engineer Associate DEA-C01 Practice Question

Amazon Kinesis Data Streams is designed for high-throughput, low-latency streaming ingestion. In on-demand mode it automatically scales to match traffic, removing the need to provision shards. Streams deliver records to consumers in well under a second and support replay: data can be retained from 24 hours up to 365 days, and consumers can re-read any portion of that window by specifying sequence numbers.

Kinesis Data Firehose introduces a minimum 60-second (or 1 MB) buffering delay and has no native mechanism to replay previously delivered data. S3 event notifications rely on object uploads, which add significant latency and do not guarantee ordered, replayable delivery. An SQS FIFO queue can store messages for up to 14 days, but FIFO throughput is limited and 40,000 messages per second would quickly exceed its quota; SQS is not optimized for real-time stream processing. Therefore, Kinesis Data Streams with an increased retention period is the most suitable choice.