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DBS-C01 Deployment and Migration Practice Question

A company is deploying a new web application that uses Amazon RDS for PostgreSQL. The database must be highly available with automatic failover across two Availability Zones. Which deployment option meets this requirement?

⚠ Common exam trap

Watch out — candidates often confuse a read replica in another AZ with Multi-AZ, as both involve a second AZ, but only Multi-AZ provides automatic synchronous failover without data loss or manual intervention.

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

✓

Deploy RDS PostgreSQL with Multi-AZ configuration.

Amazon RDS Multi-AZ deployment automatically provisions and maintains a synchronous standby replica in a different Availability Zone. If the primary DB instance fails, Amazon RDS automatically fails over to the standby, providing high availability with automatic failover across two AZs. This meets the requirement without manual intervention or application changes.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Deploy RDS PostgreSQL in a cross-region replication setup.

    Why it's wrong here

    Cross-region is for disaster recovery, not automatic failover.

  • ✓

    Deploy RDS PostgreSQL with Multi-AZ configuration.

    Why this is correct

    Multi-AZ provides automatic failover.

  • ✗

    Deploy RDS PostgreSQL in a single Availability Zone.

    Why it's wrong here

    No automatic failover.

  • ✗

    Deploy RDS PostgreSQL with a read replica in another AZ.

    Why it's wrong here

    Read replicas require manual promotion.

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JA

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.