PAS-C01 Technology Practice Question
A solutions architect is designing a disaster recovery plan for a critical application that runs on Amazon RDS for PostgreSQL. The application requires a Recovery Point Objective (RPO) of less than 5 seconds and a Recovery Time Objective (RTO) of less than 1 minute. Which RDS deployment option meets these requirements?
⚠ Common exam trap
Watch out — candidates often confuse Multi-AZ synchronous replication (which provides automatic failover and near-zero RPO) with cross-Region Read Replicas (which use asynchronous replication and require manual promotion, thus failing both RPO and RTO requirements).
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
✓
A Multi-AZ deployment with synchronous replication.
Amazon RDS Multi-AZ deployments with synchronous replication provide automatic failover to a standby instance in a different Availability Zone, ensuring data is committed to both primary and standby before acknowledging a write. This achieves an RPO of effectively zero (less than 5 seconds) and an RTO typically under 1 minute, meeting the stated requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A single-AZ deployment with cross-Region automated backups.
Why it's wrong here
Cross-Region backups have higher RPO and RTO.
- ✗
A single-AZ deployment with a standby instance manually promoted.
Why it's wrong here
Manual promotion would exceed the 1-minute RTO.
- ✓
A Multi-AZ deployment with synchronous replication.
Why this is correct
Multi-AZ provides synchronous replication and automatic failover.
- ✗
A Multi-AZ deployment with a Read Replica in a different Region.
Why it's wrong here
Read Replicas are not used for automatic failover.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PAS-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 PAS-C01 exam.