Question 1,506 of 1,663
DBS-C01 Workload-Specific Database Design Practice Question
A company uses Amazon RDS for PostgreSQL for its e-commerce platform. The application team reports increasing read latency on the primary instance during sales events. Which action should be taken to reduce read load on the primary?
⚠ Common exam trap
It's easy for candidates to confuse Multi-AZ with read replicas, assuming the standby in a Multi-AZ deployment can serve reads, but in RDS for PostgreSQL the standby is not accessible for read traffic—only Oracle and SQL Server Multi-AZ deployments offer readable standbys under specific configurations.
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
✓
Create one or more read replicas
Creating one or more read replicas offloads read traffic from the primary RDS for PostgreSQL instance, directly addressing the increased read latency during sales events. Read replicas are asynchronous replicas that can serve SELECT queries, reducing the load on the primary without requiring application changes to the write path. This is the standard AWS solution for scaling read-heavy workloads in RDS.
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 Multi-AZ deployment
Why it's wrong here
Multi-AZ provides standby for failover, not read scaling.
- ✗
Migrate to Amazon DynamoDB
Why it's wrong here
Migration is disruptive and not necessary.
- ✓
Create one or more read replicas
Why this is correct
Read replicas offload read queries from primary.
- ✗
Increase the instance size of the primary
Why it's wrong here
Scaling up helps but read replicas are more cost-effective.
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Last reviewed: Jun 24, 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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