SAA-C03 Q136 · Analytics

Question

How can trade data from DynamoDB be ingested into an S3 data lake for near real-time analysis?

Accepted Answer

**Option A: DynamoDB Streams → Lambda → S3** is correct because:

1. **DynamoDB Streams** captures item-level changes (inserts, updates, deletes) in near real-time as a time-ordered sequence of events.
2. **Lambda** can be triggered directly by DynamoDB Streams as an event source. This is a native, well-supported integration.
3. **Lambda writes directly to S3** — this is the simplest, most direct path. Lambda can format/transform the data and use the S3 PutObject API to write it.
4. **Near real-time requirement is satisfied**: DynamoDB Streams triggers Lambda within seconds of the change, and Lambda writes to S3 immediately.
5. **Minimal moving parts**: Only two services (Streams + Lambda) sit between DynamoDB and S3, reducing complexity, latency, and potential failure points.

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