DBS-C01 Deployment and Migration Practice Question
A company is deploying a DynamoDB table for a global application that requires low-latency reads and writes in multiple AWS Regions. Which THREE features should be enabled? (Choose three.)
⚠ Common exam trap
Test-takers frequently confuse DynamoDB Streams (a change-data-capture feature) with a performance optimization tool, when in fact Streams are for replication and event processing, not for reducing latency.
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 Accelerator (DAX).
DynamoDB Accelerator (DAX) is correct because it provides an in-memory cache for DynamoDB tables, delivering microsecond latency for read-heavy workloads. For a global application requiring low-latency reads across multiple AWS Regions, DAX reduces response times by offloading read traffic from the DynamoDB table to a distributed cache, which is essential for meeting strict performance SLAs.
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 Accelerator (DAX).
Why this is correct
Provides in-memory caching for low-latency reads.
- ✓
On-demand capacity mode.
Why this is correct
Handles traffic spikes without throttling.
- ✗
DynamoDB Streams.
Why it's wrong here
Streams are for capturing changes, not for low-latency access.
- ✗
Time to Live (TTL).
Why it's wrong here
TTL is for automatic data expiration, not performance.
- ✓
DynamoDB global tables.
Why this is correct
Replicates data across regions for low-latency local access.
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