- A
Use a failover routing policy with a primary and secondary record.
Failover routing is designed specifically to send traffic to a secondary endpoint when the primary becomes unhealthy.
- B
Create a health check and associate it with the primary endpoint.
Health checks give Route 53 the signal it needs to decide when the primary endpoint should stop receiving answers.
- C
Use weighted routing with a 50/50 traffic split between both Regions.
Why wrong: Weighted routing distributes traffic, but it does not automatically fail over based on endpoint health.
- D
Use latency-based routing so clients always choose the fastest Region.
Why wrong: Latency-based routing optimizes performance, but it is not the same as primary-secondary failover behavior.
- E
Use a geolocation policy without health checks.
Why wrong: Geolocation routes by user location and still requires additional health-aware design for automatic failover.
SAA-C03 Design Resilient Architectures Practice Question
This SAA-C03 practice question tests your understanding of design resilient architectures. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: failover routing directs traffic to a secondary resource when the primary is unhealthy.. 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 SaaS application is deployed in us-east-1 and us-west-2 behind separate ALBs. The business wants DNS to send new clients to the primary Region when it is healthy and automatically fail over to the secondary Region when the primary endpoint is unhealthy. Which two Route 53 settings are required? Select two.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"primary"Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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 a failover routing policy with a primary and secondary record.
A failover routing policy is correct because it allows you to designate one record as primary and another as secondary. Route 53 will route traffic to the primary record as long as it is healthy, and automatically fail over to the secondary record when the primary becomes unhealthy. This directly meets the requirement to send new clients to the primary region when healthy and fail over automatically.
Key principle: Failover routing directs traffic to a secondary resource when the primary is unhealthy.
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 failover routing policy with a primary and secondary record.
Why this is correct
Failover routing is designed specifically to send traffic to a secondary endpoint when the primary becomes unhealthy.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Failover routing directs traffic to a secondary resource when the primary is unhealthy.
- ✓
Create a health check and associate it with the primary endpoint.
Why this is correct
Health checks give Route 53 the signal it needs to decide when the primary endpoint should stop receiving answers.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Failover routing directs traffic to a secondary resource when the primary is unhealthy.
- ✗
Use weighted routing with a 50/50 traffic split between both Regions.
Why it's wrong here
Weighted routing distributes traffic, but it does not automatically fail over based on endpoint health.
- ✗
Use latency-based routing so clients always choose the fastest Region.
Why it's wrong here
Latency-based routing optimizes performance, but it is not the same as primary-secondary failover behavior.
- ✗
Use a geolocation policy without health checks.
Why it's wrong here
Geolocation routes by user location and still requires additional health-aware design for automatic failover.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse failover routing with weighted or latency-based routing, assuming any multi-region setup with health checks will automatically fail over, but only failover routing provides the explicit primary/secondary failover behavior required.
Detailed technical explanation
How to think about this question
Under the hood, Route 53 failover routing works by associating a health check with the primary record. The health check monitors the endpoint (e.g., via HTTP/HTTPS or TCP) and updates the DNS response only when the primary is healthy. If the health check fails, Route 53 automatically returns the secondary record's IP address, leveraging DNS TTL to propagate the change. In real-world scenarios, you must ensure the health check is configured with appropriate thresholds (e.g., 3 consecutive failures) to avoid flapping during transient issues.
KKey Concepts to Remember
- Failover routing directs traffic to a secondary resource when the primary is unhealthy.
- Requires a health check associated with the primary record.
- Primary and secondary records must be defined for the same DNS name.
- Health checks monitor the endpoint's status (e.g., ALB, EC2 instance).
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
Failover routing directs traffic to a secondary resource when the primary is unhealthy.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review failover routing directs traffic to a secondary resource when the primary is unhealthy., 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 — Failover routing directs traffic to a secondary resource when the primary is unhealthy..
What is the correct answer to this question?
The correct answer is: Use a failover routing policy with a primary and secondary record. — A failover routing policy is correct because it allows you to designate one record as primary and another as secondary. Route 53 will route traffic to the primary record as long as it is healthy, and automatically fail over to the secondary record when the primary becomes unhealthy. This directly meets the requirement to send new clients to the primary region when healthy and fail over automatically.
What should I do if I get this SAA-C03 question wrong?
Review failover routing directs traffic to a secondary resource when the primary is unhealthy., then practise related SAA-C03 questions on the same topic to reinforce the concept.
Are there clue words in this question I should notice?
Yes — watch for: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
What is the key concept behind this question?
Failover routing directs traffic to a secondary resource when the primary is unhealthy.
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Last reviewed: Jun 11, 2026
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