SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company runs a critical application on Amazon RDS for PostgreSQL. The database experiences high read traffic. The application is read-heavy and can tolerate eventual consistency for some queries. What is the MOST effective way to improve read performance without significant architectural changes?
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 in the same region.
Creating Read Replicas offloads read traffic from the primary instance. Option A increases cost unnecessarily, C requires application changes, and D does not directly improve read performance.
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 for failover.
Why it's wrong here
Multi-AZ is for high availability, not read scaling.
- ✓
Create one or more Read Replicas in the same region.
Why this is correct
Read Replicas handle read queries, reducing load on primary.
- ✗
Use Amazon ElastiCache to cache frequent queries.
Why it's wrong here
Requires application changes to use cache.
- ✗
Upgrade to a larger instance type.
Why it's wrong here
Increases cost without utilizing read replicas.
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Same concept, more angles
1 more way this is tested on SAP-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company runs a critical application on Amazon RDS for PostgreSQL. The database performance has degraded over time. The Solutions Architect notices that read queries are slow and the DB instance's ReadIOPS metric is consistently high. Which action would improve read performance with minimal operational overhead?
medium- A.Increase the allocated storage of the DB instance.
- B.Enable Multi-AZ deployment for the DB instance.
- C.Migrate the database to Amazon Aurora with PostgreSQL compatibility.
- ✓ D.Create an RDS read replica and redirect read queries to it.
Why D: Creating an RDS read replica (Option D) offloads read traffic from the primary instance, reducing ReadIOPS and improving read query performance. This requires minimal operational overhead because Amazon RDS manages the replica. Option A is incorrect: increasing storage can help with IOPS limits but does not directly reduce read load. Option B is incorrect: Multi-AZ provides high availability, not read scalability. Option C is incorrect: migrating to Aurora involves more effort and is not the simplest solution.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 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 SAP-C02 exam.