SAP-C02 Continuous Improvement for Existing Solutions Practice Question
A company runs a critical database on an Amazon RDS for PostgreSQL instance. The database experiences high write latency during peak hours. The company wants to improve write performance without changing the application code. Which action should the Solutions Architect take?
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
✓
Modify the RDS instance to use a larger instance type with higher IOPS.
Upgrading to a larger instance type with higher IOPS directly increases the I/O capacity of the RDS instance, improving write performance without requiring application changes. Option A is incorrect because read replicas are used to offload read traffic, not to improve write latency. Option C is incorrect because Multi-AZ deployment provides high availability and automatic failover, but does not directly improve write performance. Option D is incorrect because modifying DB parameter groups can tune certain database settings but does not increase the underlying IOPS provided by the instance type.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a read replica and offload read traffic.
Why it's wrong here
Read replicas do not help write performance.
- ✓
Modify the RDS instance to use a larger instance type with higher IOPS.
Why this is correct
Larger instance types with higher IOPS reduce write latency.
- ✗
Enable Multi-AZ deployment for the RDS instance.
Why it's wrong here
Multi-AZ improves availability, not write latency.
- ✗
Change the DB parameter group to optimize for write operations.
Why it's wrong here
Parameter changes alone may not significantly improve write latency.
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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.