DBS-C01 Amazon RDS Proxy Practice Question
A company runs an Amazon RDS for PostgreSQL instance with Multi-AZ deployment. The primary DB instance fails unexpectedly and a failover occurs. Which action should be taken to minimize downtime during future failovers?
⚠ Common exam trap
Candidates often assume Multi-AZ is not enabled or that enabling it again provides more failover benefits, but the instance already has it.
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
✓
Configure an Amazon RDS Proxy to reduce failover time.
Amazon RDS Proxy helps minimize downtime during failovers by maintaining database connections, reducing connection disruption and allowing applications to recover faster. The instance already has Multi-AZ enabled, so simply enabling it again is not a valid action. RDS Proxy provides connection pooling and seamless failover handling. Increasing instance size does not reduce failover time. Read replicas require manual promotion and are not used for automatic failover in RDS for PostgreSQL. Multi-AZ is already enabled, so there is no need to enable it again.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure an Amazon RDS Proxy to reduce failover time.
Why this is correct
Correct. RDS Proxy reduces connection disruption and helps applications recover faster during failovers, minimizing downtime.
- ✗
Increase the DB instance size to reduce failover time.
Why it's wrong here
Incorrect. Increasing the instance size does not reduce failover time; failover time is determined by database recovery, not instance size.
- ✗
Create a read replica in the same region and promote it during failover.
Why it's wrong here
Incorrect. Read replicas cannot be automatically promoted during failover; manual intervention is required, which increases downtime.
- ✗
Enable Multi-AZ deployment to automatically failover to the standby.
Why it's wrong here
Incorrect. Multi-AZ is already enabled on the instance, so enabling it again is not a valid action. The failover is already automatic, but RDS Proxy provides additional resilience.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.