Question 427 of 1,711
DEA-C01 Data Store Management Practice Question
A data engineering team is using Amazon DynamoDB to store user session data for a web application. The application experiences sudden spikes in traffic, causing throttling on the DynamoDB table. The team wants to minimize throttling without over-provisioning read/write capacity. Which solution should the team implement?
⚠ Common exam trap
It's easy for candidates to confuse DynamoDB with relational databases and incorrectly assume RDS read replicas can offload DynamoDB traffic, or they may think TTL or manual provisioning are appropriate solutions for throttling, when the correct approach is to use a caching layer like DAX to absorb read spikes.
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 DynamoDB Accelerator (DAX) caching layer.
DynamoDB Accelerator (DAX) is a fully managed, in-memory cache that reduces read latency from single-digit milliseconds to microseconds. By caching frequently accessed items, DAX offloads read requests from the DynamoDB table, directly reducing the read capacity consumption and thus minimizing throttling during traffic spikes without requiring over-provisioning of read capacity units.
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 Time to Live (TTL) to automatically delete expired items.
Why it's wrong here
TTL helps in managing storage but does not reduce throttling.
- ✗
Disable auto scaling and manually set a high provisioned capacity.
Why it's wrong here
Manual over-provisioning is inefficient and may still cause throttling if not set correctly.
- ✗
Use Amazon RDS read replicas to offload read traffic.
Why it's wrong here
Read replicas are not available for DynamoDB; they are for RDS.
- ✓
Enable DynamoDB Accelerator (DAX) caching layer.
Why this is correct
DAX caches frequently read items, reducing read capacity consumption and throttling.
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Last reviewed: Jul 4, 2026
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.
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