The answer is to take EBS snapshots every 15 minutes and copy them to another Region using cross-region snapshot copy. This meets the 15-minute RPO because EBS snapshots can be scheduled as frequently as every 15 minutes via Data Lifecycle Manager, and the cross-region copy ensures the backup data resides in a separate geographic location for disaster recovery. The 1-hour RTO is achievable because you can restore these snapshots into new EBS volumes and attach them to EC2 instances in the target Region quickly. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of balancing cost and recovery objectives—snapshots are far cheaper than continuous replication of entire instances. A common trap is choosing cross-region instance replication, which is overkill and expensive for data-only recovery. Remember the mnemonic: “Snapshots for data, instances for state”—snapshots handle persistent block storage efficiently, while full instance replication is reserved for when you need the entire server configuration instantly.
SOA-C02 Reliability and Business Continuity Practice Question
This SOA-C02 practice question tests your understanding of reliability and business continuity. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 SysOps administrator is designing a disaster recovery strategy for a critical application that runs on EC2 instances. The application data is stored on EBS volumes. The recovery point objective (RPO) is 15 minutes, and the recovery time objective (RTO) is 1 hour. Which solution meets these requirements MOST cost-effectively?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Take EBS snapshots every 15 minutes and copy them to another Region using cross-region snapshot copy.
Option D is correct because EBS snapshots can be taken every 15 minutes (or via Data Lifecycle Manager) and restored quickly to new volumes in another region. Option A is wrong because cross-region replication of EC2 instances is more expensive and complex. Option B is wrong because AMIs do not capture data changes frequently enough. Option C is wrong because S3 is not suitable for live application data.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 AWS CloudEndure to continuously replicate the EC2 instances to another Region.
Why it's wrong here
More expensive than needed for 15-minute RPO.
✗
Use AWS Backup to back up the application data to Amazon S3 every 15 minutes.
Why it's wrong here
S3 is not designed for live application recovery.
✗
Take hourly AMIs of the instances and copy them to another Region.
Why it's wrong here
Hourly AMIs do not meet 15-minute RPO.
✓
Take EBS snapshots every 15 minutes and copy them to another Region using cross-region snapshot copy.
Why this is correct
Meets RPO of 15 minutes and RTO of 1 hour cost-effectively.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Reliability and Business Continuity — This question tests Reliability and Business Continuity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Take EBS snapshots every 15 minutes and copy them to another Region using cross-region snapshot copy. — Option D is correct because EBS snapshots can be taken every 15 minutes (or via Data Lifecycle Manager) and restored quickly to new volumes in another region. Option A is wrong because cross-region replication of EC2 instances is more expensive and complex. Option B is wrong because AMIs do not capture data changes frequently enough. Option C is wrong because S3 is not suitable for live application data.
What should I do if I get this SOA-C02 question wrong?
Identify which SOA-C02 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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