DBS-C01 Monitoring and Troubleshooting Practice Question
A company is using Amazon DynamoDB with auto scaling enabled. Despite auto scaling, the application is still experiencing throttling during traffic spikes. Which THREE actions should the company take to resolve this issue? (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 code
Exponential backoff (A) is a best practice to retry throttled requests gracefully, reducing retry storms. DAX (B) caches read-heavy workloads, reducing read capacity unit consumption and mitigating hot key issues. Global tables (C) distribute write traffic across multiple regions, alleviating write throttling. Option D (on-demand capacity) could help but may be cost-prohibitive and does not address hot keys. Option E (disable auto scaling) would worsen throttling by fixing capacity. Therefore, A, B, and C are correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Implement exponential backoff in the application code
Why this is correct
Exponential backoff helps retry throttled requests without overwhelming the system.
- ✓
Enable DynamoDB Accelerator (DAX) to cache read-heavy workloads
Why this is correct
DAX reduces read load on the table, reducing throttling.
- ✓
Use DynamoDB global tables to distribute write traffic across regions
Why this is correct
Global tables can spread write load, reducing throttling.
- ✗
Switch to on-demand capacity mode
Why it's wrong here
On-demand may help but is not one of the three best actions; it also does not address hot keys.
- ✗
Disable auto scaling and set fixed capacity
Why it's wrong here
Disabling auto scaling would not help; it may worsen the issue.
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JA
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.