DBS-C01 Monitoring and Troubleshooting Practice Question
A team is troubleshooting a DynamoDB table that has high read latency. The table uses on-demand capacity and has a global secondary index (GSI). Which configuration is MOST likely causing the issue?
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
✓
The GSI has provisioned capacity set too low
An under-provisioned GSI can throttle reads even if the base table uses on-demand. Option B is wrong because TTL does not affect read latency. Option C is wrong because DAX reduces latency, not increases. Option D is wrong because on-demand capacity handles bursts and does not cause high latency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The GSI has provisioned capacity set too low
Why this is correct
GSIs have independent capacity; throttling on GSI causes high latency.
- ✗
Time-to-Live (TTL) is enabled
Why it's wrong here
TTL only deletes expired items, it does not impact read latency.
- ✗
DAX is enabled for the table
Why it's wrong here
DAX is a caching layer that reduces latency.
- ✗
The table uses on-demand capacity
Why it's wrong here
On-demand automatically scales, so it's not the cause.
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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.