Question 367 of 1,663
DBS-C01 Management and Operations Practice Question
A company is using Amazon ElastiCache for Redis as a caching layer in front of an Amazon Aurora MySQL database. The application is experiencing higher latency than expected. Which database design pattern should the specialist recommend to improve read performance?
⚠ Common exam trap
Many exam-takers assume that increasing cache capacity (Option A) or adding cache replicas (Option B) will solve read performance issues, but the real problem is that the cache is not effectively reducing database load, so the solution must address the database read path directly with Aurora Replicas.
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
✓
Use Aurora Replicas to offload read traffic from the primary instance.
The application is experiencing higher latency than expected despite using ElastiCache for Redis. This indicates that the cache is not effectively absorbing read traffic, likely due to cache misses or insufficient cache hit ratio. By using Aurora Replicas, read traffic can be offloaded from the primary Aurora instance, reducing load and improving read performance directly at the database layer, which complements the caching layer.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the ElastiCache cluster size to accommodate more data.
Why it's wrong here
Cache size may not address latency from database reads.
- ✗
Enable Multi-AZ on the ElastiCache cluster and use read replicas.
Why it's wrong here
ElastiCache already provides replicas; the bottleneck is likely the database.
- ✓
Use Aurora Replicas to offload read traffic from the primary instance.
Why this is correct
Aurora Replicas can handle read queries and reduce latency.
- ✗
Implement Amazon DynamoDB Accelerator (DAX) in front of Aurora.
Why it's wrong here
DAX is for DynamoDB, not Aurora.
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Last reviewed: Jul 4, 2026
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.
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