- A
Use a single Route 53 A record that points only to Region A’s ALB and manually update it after failures.
Why wrong: A single-record setup does not provide automatic failover and still requires manual changes during outages.
- B
Use Route 53 latency-based routing with separate records for each region.
Why wrong: Latency-based routing optimizes user proximity, but it does not automatically fail over based on health checks.
- C
Use Route 53 failover routing with health checks for each region’s endpoint.
Failover routing works with health checks to move traffic from a primary endpoint to a secondary endpoint when the primary becomes unhealthy.
- D
Use weighted routing and set the Region B weight to 0 to ensure it is only used when needed.
Why wrong: Weighted routing does not react to health status. Weight changes are not automatic failover responses.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. A key principle to apply: route 53 failover routing shifts traffic from a primary to a secondary resource.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company runs the same public API in two regions (Region A and Region B), each fronted by an ALB. They want Route 53 to automatically route clients to the Region B API when Region A becomes unhealthy, with minimal configuration effort. Which Route 53 approach should they use?
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
Use Route 53 failover routing with health checks for each region’s endpoint.
Route 53 failover routing with health checks is the correct choice because it automatically directs traffic to a secondary endpoint (Region B) when the primary endpoint (Region A) fails a health check. This provides active-passive failover with minimal configuration, as Route 53 monitors the health of each ALB and updates DNS responses accordingly without manual intervention.
Key principle: Route 53 failover routing shifts traffic from a primary to a secondary resource.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use a single Route 53 A record that points only to Region A’s ALB and manually update it after failures.
Why it's wrong here
A single-record setup does not provide automatic failover and still requires manual changes during outages.
- ✗
Use Route 53 latency-based routing with separate records for each region.
Why it's wrong here
Latency-based routing optimizes user proximity, but it does not automatically fail over based on health checks.
- ✓
Use Route 53 failover routing with health checks for each region’s endpoint.
Why this is correct
Failover routing works with health checks to move traffic from a primary endpoint to a secondary endpoint when the primary becomes unhealthy.
Related concept
Route 53 failover routing shifts traffic from a primary to a secondary resource.
- ✗
Use weighted routing and set the Region B weight to 0 to ensure it is only used when needed.
Why it's wrong here
Weighted routing does not react to health status. Weight changes are not automatic failover responses.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse latency-based routing with failover capabilities, assuming latency routing will automatically avoid unhealthy endpoints, but it only optimizes for speed and requires health checks to be manually integrated via a separate routing policy.
Detailed technical explanation
How to think about this question
Failover routing in Route 53 uses health checks that can monitor an endpoint (e.g., ALB) via HTTP/HTTPS, TCP, or calculated checks. When the primary record's health check fails, Route 53 removes that record from DNS responses and returns only the secondary record's IP, with a TTL typically set low (e.g., 60 seconds) to speed up failover. This mechanism relies on DNS caching behavior, so failover is not instantaneous but occurs within the TTL window, making it suitable for active-passive disaster recovery scenarios.
KKey Concepts to Remember
- Route 53 failover routing shifts traffic from a primary to a secondary resource.
- Failover routing requires Route 53 health checks to monitor endpoint health.
- It supports active-passive configurations for high availability.
- Automatic failover eliminates manual intervention during outages.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Route 53 failover routing shifts traffic from a primary to a secondary resource.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Route 53 failover routing shifts traffic from a primary to a secondary resource. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review route 53 failover routing shifts traffic from a primary to a secondary resource., then practise related SAA-C03 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Design Resilient Architectures — This question tests Design Resilient Architectures — Route 53 failover routing shifts traffic from a primary to a secondary resource..
What is the correct answer to this question?
The correct answer is: Use Route 53 failover routing with health checks for each region’s endpoint. — Route 53 failover routing with health checks is the correct choice because it automatically directs traffic to a secondary endpoint (Region B) when the primary endpoint (Region A) fails a health check. This provides active-passive failover with minimal configuration, as Route 53 monitors the health of each ALB and updates DNS responses accordingly without manual intervention.
What should I do if I get this SAA-C03 question wrong?
Review route 53 failover routing shifts traffic from a primary to a secondary resource., then practise related SAA-C03 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Route 53 failover routing shifts traffic from a primary to a secondary resource.
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Last reviewed: Jun 11, 2026
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