DBS-C01 Management and Operations Practice Question
A company is using Amazon DynamoDB with auto scaling enabled. The table's write capacity is set to a minimum of 50 and maximum of 500 write capacity units (WCUs). The actual consumed write capacity is consistently at 100 WCUs. What should the database specialist do to optimize costs without impacting performance?
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
✓
Lower the minimum write capacity to 100 WCUs.
Lower the minimum write capacity to 100 WCUs. With auto scaling enabled and actual consumed write capacity consistently at 100 WCUs, the minimum should match the actual usage to avoid over-provisioning. Setting it to 100 WCUs ensures that baseline capacity is just enough for normal operations, while auto scaling can still scale up to 500 WCUs during traffic spikes. Option A (increasing minimum to 200 WCUs) would raise costs without benefit. Option B (disabling auto scaling and fixing at 100 WCUs) removes the ability to scale up, risking throttling during spikes. Option D (decreasing maximum to 200 WCUs) limits scalability and could cause throttling if traffic exceeds 200 WCUs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the minimum write capacity to 200 WCUs.
Why it's wrong here
Would increase costs unnecessarily.
- ✗
Disable auto scaling and set the write capacity to 100 WCUs.
Why it's wrong here
Removes elasticity for traffic variations.
- ✓
Lower the minimum write capacity to 100 WCUs.
Why this is correct
Matches actual consumption.
- ✗
Decrease the maximum write capacity to 200 WCUs.
Why it's wrong here
May cause throttling during traffic spikes.
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This DBS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DBS-C01 exam.