DBS-C01 Management and Operations Practice Question
A company uses Amazon DynamoDB with provisioned capacity for a critical application. During a traffic spike, the table experiences throttling on write requests. The DBA needs to resolve the issue quickly. Which THREE actions should the DBA take? (Choose THREE.)
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
✓
Implement exponential backoff in the application's write requests.
Uses exponential backoff to handle throttling by retrying requests with increasing delays. Option C temporarily increases write capacity units (WCU) to handle the spike. Option D enables auto scaling to automatically adjust capacity. Option A is incorrect because switching to on-demand may resolve throttling but is not one of the three correct actions; the question asks for three specific actions, and B, C, D are the correct combination. Option E is wrong because DAX is a caching layer for reads, not writes, and does not resolve write throttling.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Switch the table to on-demand capacity mode.
Why it's wrong here
On-demand may help but is not immediate and can be costly.
- ✓
Implement exponential backoff in the application's write requests.
Why this is correct
Exponential backoff reduces retry collisions.
- ✓
Temporarily increase the write capacity units (WCU) using the AWS Console or CLI.
Why this is correct
Immediate increase solves throttling.
- ✓
Enable auto scaling for the table to automatically adjust capacity.
Why this is correct
Auto scaling helps handle future spikes.
- ✗
Enable DynamoDB Accelerator (DAX) to cache writes.
Why it's wrong here
DAX caches reads, not writes.
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