DBS-C01 Management and Operations Practice Question
A company is using Amazon DynamoDB with auto scaling enabled. The table's read capacity is set to a minimum of 100 and maximum of 1000 read capacity units (RCUs). The actual consumed read capacity is consistently at 200 RCUs. 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 read capacity to 200 RCUs.
Lowering the minimum to 200 RCUs ensures auto scaling does not scale below the actual usage, reducing provisioned capacity costs. Option B is wrong because decreasing the maximum could cause throttling during spikes. Option C is wrong because disabling auto scaling would require manual management and may lead to over-provisioning or under-provisioning. Option D is wrong because increasing the minimum would increase costs unnecessarily.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Lower the minimum read capacity to 200 RCUs.
Why this is correct
Correct: Setting the minimum to 200 RCUs matches the actual consumption, avoiding paying for unused capacity while allowing auto scaling to handle spikes.
- ✗
Decrease the maximum read capacity to 500 RCUs.
Why it's wrong here
Wrong: Decreasing the maximum to 500 RCUs might cause throttling if traffic spikes exceed that capacity.
- ✗
Disable auto scaling and set the read capacity to 200 RCUs.
Why it's wrong here
Wrong: Disabling auto scaling removes the ability to automatically adjust to demand, and setting a fixed 200 RCUs may not handle spikes efficiently.
- ✗
Increase the minimum read capacity to 500 RCUs.
Why it's wrong here
Wrong: Increasing the minimum to 500 RCUs would over-provision capacity, increasing costs without performance benefit.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.