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SAA-C03 Practice Question: Route 53 Failover routing provides active-passive…
This SAA-C03 practice question tests your understanding of route 53 failover routing provides active-passive…. 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 provides active-passive DNS failover with health checks. 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 hosts a web application on EC2 instances behind an Application Load Balancer (ALB) in us-east-1. A static failover site is hosted in an S3 bucket with static website hosting enabled. The company needs automatic DNS failover to the S3 bucket if the primary ALB becomes unhealthy. Which Route 53 configuration achieves this?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Configure Route 53 Weighted routing with 100% weight on the ALB and 0% on the S3 bucket
Weighted routing splits traffic by percentage. A 0% weight record is never served. Weighted routing does not switch to the secondary when the primary is unhealthy.
B
Distractor review
Configure Route 53 Latency routing with records in both regions to route to the healthiest endpoint
Latency routing routes to the lowest-latency endpoint for each client — it does not implement primary/secondary failover to a specific static site backup.
C
Distractor review
Configure Route 53 Geolocation routing with North American users directed to the ALB and all others to S3
Geolocation routing directs traffic by user location, not resource health. North American users would always go to the ALB even when it is unhealthy.
D
Best answer
Configure Route 53 Failover routing with a health check on the ALB as PRIMARY and the S3 bucket website endpoint as SECONDARY
Failover routing with a health-checked PRIMARY (ALB) and SECONDARY (S3) provides automatic DNS switchover. When the ALB health check fails, Route 53 returns the S3 endpoint automatically.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Route 53 offers multiple routing policies. Failover routing is active-passive — one primary resource, one standby. Weighted routing splits traffic percentages (active-active). Latency routing picks the lowest-latency endpoint. Geolocation routes by user geography. Only Failover routing provides automatic primary/secondary switchover based on health checks. Weighted routing at 100%/0% does NOT failover when the 100% target fails.
Technical deep dive
How to think about this question
Route 53 routing policies: - Simple: single resource, no health checks - Failover: active-passive DR with health check on primary - Weighted: traffic split by percentage (A/B testing) - Latency: route to lowest-latency region - Geolocation: route by user country/continent - Geoproximity: route by distance with bias - Multivalue Answer: up to 8 healthy records S3 static website failover requirements: - Bucket name must match the DNS record name (e.g., bucket 'example.com' for domain example.com) - Static website hosting must be enabled on the S3 bucket - Route 53 alias records are free and integrate natively with S3 website endpoints
KKey Concepts to Remember
- Route 53 Failover routing provides active-passive DNS failover with health checks
- The primary record requires a health check; the secondary is returned when primary is unhealthy
- Health check failure is detected after 3 consecutive failures (default) at 30-second intervals
- S3 bucket name must match the domain name for Route 53 alias records to work
- Weighted routing does not provide automatic failover — it splits traffic by percentage only
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 provides active-passive DNS failover with health checks
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FAQ
Questions learners often ask
What does this SAA-C03 question test?
Route 53 Failover routing provides active-passive DNS failover with health checks
What is the correct answer to this question?
The correct answer is: Configure Route 53 Failover routing with a health check on the ALB as PRIMARY and the S3 bucket website endpoint as SECONDARY — Route 53 Failover routing uses health checks to route traffic to a primary resource and automatically switch to a secondary when the primary health check fails. Configuration: Create a Route 53 health check targeting the ALB endpoint. Create a PRIMARY alias A record pointing to the ALB with the health check associated. Create a SECONDARY alias A record pointing to the S3 static website endpoint. When the ALB health check fails, Route 53 returns the S3 endpoint automatically.
What should I do if I get this SAA-C03 question wrong?
Review route 53 Failover routing provides active-passive DNS failover with health checks, then practise related SAA-C03 questions on the same topic to reinforce the concept.
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