DEA-C01 Data Store Management Practice Question
A company uses Amazon DynamoDB with global tables in three AWS Regions. The data engineer needs to ensure that writes to the table in us-east-1 are replicated to other regions with minimal latency. Which DynamoDB feature should be used?
⚠ Common exam trap
Candidates often confuse DynamoDB Streams (a change capture mechanism) with Global Tables (a managed replication service), not realizing that Streams alone cannot replicate data across regions without additional custom code.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DynamoDB Global Tables
DynamoDB Global Tables is the correct feature because it provides multi-region, multi-master replication, automatically replicating writes from us-east-1 to other regions with sub-second latency. This is achieved through DynamoDB Streams and a last-writer-wins conflict resolution mechanism, ensuring data consistency across regions without requiring custom replication logic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
DynamoDB Global Tables
Why this is correct
Global Tables replicate data across regions automatically.
- ✗
DynamoDB Time to Live (TTL)
Why it's wrong here
TTL is for item expiration.
- ✗
DynamoDB Streams
Why it's wrong here
Streams require custom consumer to replicate.
- ✗
DynamoDB Accelerator (DAX)
Why it's wrong here
DAX is an in-memory cache, not replication.
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