hardMultiple ChoiceObjective-mapped
CAS-004 Practice Question: A cloud security architect is designing a…
A cloud security architect is designing a multi-region active-active application. The application must maintain high availability even if an entire AWS region fails. Which architecture BEST meets this requirement?
⚠ Common exam trap
The primary trap in this question is that candidates may confuse multi-AZ or single-region high availability with true multi-region active-active resilience, or assume that Route 53 health checks alone make an architecture active-active when they are often used for failover (active-passive).
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 identical stacks in two regions with Route 53 weighted routing and DynamoDB global tables
Deploying identical application stacks in two AWS regions with Route 53 weighted routing distributes traffic evenly across both regions, and DynamoDB global tables provide multi-region, multi-master replication with eventual consistency, ensuring the application remains fully active and available even if an entire AWS region fails. This architecture meets the active-active and region-failure requirement without relying on failover or single-region dependencies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Active-active in one region with auto scaling
Why it's wrong here
Still single region; a region outage takes down the entire application.
- ✓
Deploy identical stacks in two regions with Route 53 weighted routing and DynamoDB global tables
Why this is correct
This provides active-active multi-region with automatic traffic distribution and data replication.
- ✗
Single region with multiple AZs and RDS Multi-AZ
Why it's wrong here
This only protects against AZ failure, not a full region outage.
- ✗
Two regions with active-passive failover using Route 53 health checks
Why it's wrong here
Active-passive requires failover time and is not truly active-active.
Go deeper
Related to this question
About these practice questions
This CAS-005 question is part of Courseiva's 968-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.