Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company runs its primary database on an Amazon RDS for MySQL DB instance in the us-east-1 Region. The company's disaster recovery policy requires that the database be recoverable in a different AWS Region within 1 hour of a region-wide failure, with a Recovery Point Objective (RPO) of less than 5 minutes and a Recovery Time Objective (RTO) of less than 1 hour. Which AWS feature 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
Deploy a Multi-AZ RDS DB instance in us-east-1.
Multi-AZ provides automatic failover to a standby instance in a different Availability Zone within the same region. It does not provide protection against a region-wide outage because the standby is still in the same region. This option does not meet the cross-region DR requirement.
B
Best answer
Create a cross-region read replica of the DB instance in us-west-2.
A cross-region read replica asynchronously replicates data from the primary RDS instance to a replica in another region. The replica can be promoted to a standalone primary instance in minutes, achieving an RTO under 1 hour. As replication is near real-time, the RPO is typically a few seconds to minutes, satisfying the <5 minute RPO. This is the correct solution.
C
Distractor review
Take manual DB snapshots daily and copy them to us-west-2.
Manual snapshots are taken at discrete points in time (daily), so the RPO is up to 24 hours, which exceeds the required 5 minutes. Restoring from a snapshot also takes time, which may push the RTO beyond 1 hour. This option does not meet the stated RPO and RTO targets.
D
Distractor review
Enable termination protection on the RDS instance.
Termination protection prevents the RDS instance from being accidentally deleted through the console or API. It does not provide any data replication or failover capability across regions and is irrelevant to disaster recovery requirements.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Create a cross-region read replica of the DB instance in us-west-2. — For cross-region disaster recovery with a very low RPO (minutes) and a fast RTO (under an hour), a cross-region read replica is the best solution. It uses asynchronous replication to keep a replica in another region nearly up to date, and it can be promoted to a standalone primary DB instance in minutes. Multi-AZ provides high availability within a single region only, not cross-region. Manual snapshots have an RPO of at least a day if taken daily, which exceeds 5 minutes. Termination protection prevents accidental deletion but does not help with disaster recovery. Therefore, a cross-region read replica is the correct choice.
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.
Discussion
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