DEA-C01 Data Operations and Support Practice Question
A company uses Amazon DynamoDB as the primary data store for a high-traffic application. Recently, read latency has increased significantly. The DynamoDB table has on-demand capacity mode. Which action is MOST effective to reduce read latency?
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
✓
Add a DynamoDB Accelerator (DAX) cluster in front of the table
DynamoDB Accelerator (DAX) is an in-memory cache that significantly reduces read latency for frequent reads, especially for high-traffic applications. Option B is incorrect because switching to provisioned capacity does not inherently reduce latency; it only manages throughput. Option C is incorrect because on-demand capacity mode does not use read capacity units or auto scaling settings for read capacity adjustments. Option D is incorrect because Global Tables replicate data across regions for disaster recovery and global access, but do not reduce read latency for reads in the same region.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Add a DynamoDB Accelerator (DAX) cluster in front of the table
Why this is correct
DAX caches reads, reducing latency.
- ✗
Switch the table to provisioned capacity mode with higher read capacity
Why it's wrong here
On-demand already handles spikes; switching may not help.
- ✗
Increase the read capacity units in the table's auto scaling settings
Why it's wrong here
On-demand does not use provisioned capacity.
- ✗
Enable DynamoDB Global Tables to distribute reads across regions
Why it's wrong here
Global Tables are for cross-region replication, not local read latency.
Go deeper
Related to this question
About these practice questions
Courseiva writes every DEA-C01 question from scratch — 1,711 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DEA-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 DEA-C01 exam.