Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company hosts its primary web application on Amazon EC2 instances in the us-east-1 AWS Region. To meet disaster recovery requirements, the company has launched an identical set of EC2 instances in the eu-west-1 Region. The company wants to direct all user traffic to the us-east-1 endpoints under normal conditions. If us-east-1 becomes unhealthy due to a regional outage, traffic must be automatically redirected to the eu-west-1 endpoints. The company uses Amazon Route 53 as its DNS service. Which Route 53 routing policy should the company use to meet these requirements?
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
Geolocation routing
Geolocation routing directs traffic based on the geographic location of the user's DNS resolver. It does not provide automatic failover if a region becomes unhealthy. It is used to localize content or restrict access by geography, not for active-passive failover.
B
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Latency routing
Latency routing sends traffic to the endpoint with the lowest network latency for the user. While it can work with health checks to avoid unhealthy endpoints, it does not enforce a specific primary/secondary failover relationship as required by the company. The company wants a clear active-passive configuration, not dynamic latency-based selection.
C
Best answer
Failover routing
Failover routing is specifically designed for active-passive failover. You configure a primary and a secondary record. Route 53 uses health checks to monitor the primary endpoint; if it fails, traffic is automatically directed to the secondary endpoint. This exactly meets the company's requirement for normal traffic to us-east-1 with automatic redirection to eu-west-1 during a failure.
D
Distractor review
Weighted routing
Weighted routing distributes traffic across multiple endpoints based on relative weights. It is commonly used for A/B testing, canary deployments, or balancing traffic between regions. It does not provide automatic failover: if one endpoint becomes unhealthy, traffic is still sent to it unless health checks are explicitly configured to remove it from rotation, which still does not enforce a primary/secondary order.
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
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer needs to launch a test server for a new application prototype. The developer logs into the AWS Management Console, selects an Amazon EC2 instance type, configures the security group, and starts the instance. The instance is running within two minutes, and the developer did not need to submit a formal request to the company's IT procurement team or wait for approval from a cloud administrator. Which essential characteristic of cloud computing does this scenario best demonstrate?
Question 2
A solutions architect is planning a new web application on AWS. The workload will include 3 Amazon EC2 instances (t3.medium) running 24/7, an Application Load Balancer, and an Amazon RDS for MySQL db.t3.small database. The architect needs to estimate the monthly cost for the first year, considering different purchasing options (On-Demand, 1-year All Upfront Reserved Instance, and Compute Savings Plan). Which AWS tool should the architect use to create this estimate?
Question 3
A company's development team frequently needs temporary test environments. A developer can log into the AWS Management Console, select an Amazon EC2 instance type, configure storage, and launch the instance within minutes without any interaction with the IT infrastructure team. This capability is an example of which essential characteristic of cloud computing?
Question 4
A company's finance team needs to analyze AWS spending in detail. They require a report that includes hourly cost data for each AWS service, each individual resource (e.g., a specific EC2 instance), and any cost allocation tags applied. The team plans to export this data to an Amazon S3 bucket and then import it into a custom business intelligence (BI) analytics dashboard. Which AWS tool should the finance team use to generate this level of detailed cost data?
Question 5
A company uses AWS for its development environment. The finance team wants to set a monthly budget of $10,000. They want to receive an email notification when the actual costs reach 80% of the budget ($8,000) and again when costs exceed the budget. The team needs a managed AWS service that can automatically send these alerts without requiring custom code or third-party tools. Which AWS service should the team use?
Question 6
A company uses AWS Organizations to manage multiple accounts. The security team needs to enforce a policy that restricts SSH access (port 22) from the internet (0.0.0.0/0) in all VPCs across all accounts. The team wants to centrally define the allowed rules and automatically apply them to newly created VPCs and security groups, while also automatically remediating any existing non-compliant security groups. Which AWS service should the team use?
FAQ
Questions learners often ask
What does this CLF-C02 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Failover routing — The failover routing policy in Amazon Route 53 is designed for active-passive failover scenarios. It lets you configure one primary resource (e.g., an Application Load Balancer in us-east-1) and one secondary resource (e.g., in eu-west-1). When Route 53 determines that the primary resource is unhealthy (via health checks), it automatically routes traffic to the secondary resource. This matches the company's requirement: normal traffic goes to us-east-1, with automatic failover to eu-west-1 if us-east-1 becomes unhealthy. Geolocation routing sends traffic based on the geographic location of the user, not on health. Latency routing sends traffic to the endpoint with the lowest latency, which does not guarantee a specific failover order. Weighted routing distributes traffic based on assigned weights and is used for load balancing or testing, not for failover.
What should I do if I get this CLF-C02 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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