SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company uses Amazon DynamoDB as a data store for a mobile application. The application experiences throttling errors during peak hours. The table has a provisioned read capacity of 5000 RCUs and write capacity of 2000 WCUs. The throttling is on writes. What is the MOST cost-effective solution?
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
✓
Enable auto scaling for DynamoDB write capacity.
DynamoDB Accelerator (DAX) is a read cache, not for writes. The most cost-effective solution is to use DynamoDB auto scaling for writes to handle peak loads without over-provisioning.
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 Accelerator (DAX) to offload writes.
Why it's wrong here
DAX is for reads, not writes.
- ✗
Switch to on-demand capacity mode.
Why it's wrong here
On-demand is costly for predictable workloads and may exceed budget.
- ✗
Increase write capacity to 4000 WCUs.
Why it's wrong here
Over-provisioning is not cost-effective.
- ✓
Enable auto scaling for DynamoDB write capacity.
Why this is correct
Auto scaling adjusts capacity based on traffic, reducing throttling and cost.
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This SAP-C02 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 SAP-C02 exam.