DBS-C01 Management and Operations Practice Question
A company has an Amazon DynamoDB table with provisioned capacity. The table experiences occasional spikes in write traffic that exceed the provisioned write capacity units (WCU). Which feature should the database specialist enable to handle these spikes without throttling?
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
✓
Configure DynamoDB Auto Scaling for write capacity.
DynamoDB Auto Scaling automatically adjusts the provisioned read and write capacity based on actual traffic patterns, enabling the table to handle spikes without throttling while maintaining cost efficiency. Option A is incorrect because burst capacity provides a limited buffer for short-term spikes but can be exhausted, leading to throttling. Option C is incorrect because DAX is an in-memory cache for read operations, not writes. Option D is incorrect because switching to on-demand capacity mode can handle spikes but may result in higher costs compared to Auto Scaling with provisioned capacity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable DynamoDB burst capacity.
Why it's wrong here
Burst capacity is limited and may not handle sustained spikes.
- ✓
Configure DynamoDB Auto Scaling for write capacity.
Why this is correct
Auto Scaling adjusts capacity automatically to handle spikes.
- ✗
Use DynamoDB Accelerator (DAX) to cache writes.
Why it's wrong here
DAX caches reads, not writes.
- ✗
Switch to on-demand capacity mode.
Why it's wrong here
On-demand can handle spikes but may cost more.
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