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SOA-C02 Practice Question: Route 53 failover routing policy for…
This SOA-C02 practice question tests your understanding of route 53 failover routing policy for…. 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. 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 web application is deployed in us-east-1 (primary) and eu-west-1 (standby). Under normal conditions, all traffic should go to us-east-1. If the us-east-1 health check fails, traffic must automatically redirect to eu-west-1 within 30 to 60 seconds. What Route 53 configuration implements 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
Enable Route 53 latency routing with records for both regions; Route 53 will automatically switch to eu-west-1 when us-east-1 becomes unavailable
Latency routing selects the region that offers the lowest latency for the client, not the region that is healthy. If us-east-1 is unreachable, latency routing does not automatically exclude it — Route 53 may still return the us-east-1 record even if the endpoint is down, because latency routing has no concept of health-based exclusion without a health check.
B
Distractor review
Configure Route 53 geolocation routing to send all US traffic to us-east-1 and all European traffic to eu-west-1
Geolocation routing directs traffic based on the geographic origin of the client request, not based on endpoint health. A US user will always be sent to us-east-1 even if it is down, because geolocation routing does not monitor health. This does not implement an active-passive failover.
C
Best answer
Create failover routing records for the domain: a Primary record pointing to us-east-1 with a Route 53 health check, and a Secondary record pointing to eu-west-1 with no health check
When the health check on the Primary record fails for the configured number of consecutive intervals, Route 53 removes the Primary from DNS responses and serves the Secondary. DNS TTL on the records should be set low (60 seconds or less) to minimize client-side caching delay. The failover is automatic, with no manual intervention or Lambda functions required.
D
Distractor review
Use weighted routing with 100 weight for us-east-1 and 0 weight for eu-west-1; update the weights via Lambda when a CloudWatch alarm fires
Weighted routing with 0 weight for the secondary effectively removes it from rotation, but traffic continues to the primary even if it is unhealthy. Failover requires a manual or automated weight update via a Lambda triggered by an alarm, adding latency and operational complexity. Failover routing policy handles this automatically with no Lambda required.
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Route 53 failover routing
- health check
- active-passive
- primary and secondary record
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
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More questions from this exam
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Question 1
A company uses Amazon CloudFront to deliver content to a global audience. The origin is an Application Load Balancer in us-east-1. The SysOps administrator wants to reduce costs by minimizing the number of requests that reach the origin server. Which action should the administrator take?
Question 2
A company runs a batch processing application on Amazon EC2 that runs for 2 hours every night. The workload can tolerate interruptions. Which EC2 purchasing option provides the lowest cost for this use case?
Question 3
A SysOps administrator needs to monitor the CPU utilization of an Amazon RDS DB instance and receive an alarm when CPU utilization exceeds 80% for 5 consecutive minutes. Which AWS service should be used to create this alarm?
Question 4
A company runs a critical web application on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). The application uses session stickiness (sticky sessions) to maintain user sessions. The SysOps administrator notices that when instances are replaced during a scale-in or failure event, users lose their session data. The administrator needs to preserve session data across instance failures without losing stickiness benefits. What should the administrator do?
Question 5
A company runs a production web application on a single Amazon EC2 instance. The application experiences a predictable and steady workload 24/7. The SysOps administrator wants to minimize compute costs for this instance while ensuring it remains available during the expected workload. Which EC2 purchasing option should the administrator use?
Question 6
A company has a VPC with public and private subnets. The private subnets host application servers that need to make outbound HTTPS connections to the internet. The SysOps administrator must implement a solution that provides outbound internet connectivity while preventing inbound connections from the internet. Additionally, the solution must allow the company to control which domains the application servers can access. Which solution should the administrator implement?
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Route 53 failover routing
What is the correct answer to this question?
The correct answer is: Create failover routing records for the domain: a Primary record pointing to us-east-1 with a Route 53 health check, and a Secondary record pointing to eu-west-1 with no health check — Route 53 failover routing policy uses two records with the same name: one Primary and one Secondary. A Route 53 health check is associated with the Primary record. If the health check fails, Route 53 stops returning the Primary record and starts returning the Secondary record. Health check evaluation intervals can be set to 10 seconds (fast) or 30 seconds (standard). With a 10-second interval and a 3-failure threshold, failover completes in approximately 30 seconds — meeting the requirement.
What should I do if I get this SOA-C02 question wrong?
Review route 53 failover routing, then practise related SOA-C02 questions on the same topic to reinforce the concept.
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