- A
Configure an Amazon EC2 automatic recovery action using a CloudWatch alarm
Automatic recovery restores the instance with its attached volumes and data, achieving both low RTO and zero RPO.
- B
Schedule EBS snapshots every 15 minutes and use a Lambda function to launch a new instance from the latest snapshot
Why wrong: This meets the RPO of 15 minutes but the RTO may exceed 30 minutes due to snapshot restore and instance boot times.
- C
Use an Auto Scaling group with a custom AMI that is updated every 15 minutes
Why wrong: Creating an AMI every 15 minutes is time-consuming and may not capture all data changes; AMI creation also causes instance reboot if using root volume.
- D
Use an Application Load Balancer with health checks to redirect traffic to a standby instance
Why wrong: An Application Load Balancer only distributes traffic; it does not handle stateful failover and the standby instance would not have the same data without additional replication.
Quick Answer
The answer is to configure an Amazon EC2 automatic recovery action using a CloudWatch alarm. This is correct because EC2 automatic recovery, triggered by a CloudWatch alarm based on a failed status check, restarts the instance on new hardware while preserving the same attached EBS volume and its data, meeting the 15-minute RPO and 30-minute RTO. On the AWS Certified SysOps Administrator Associate SOA-C02 exam, this scenario tests your understanding of how automatic recovery differs from launching a new instance from an AMI—a common trap is choosing a snapshot-based solution, which would fail the RTO because it requires manual steps and boot time. Remember that automatic recovery keeps the same instance ID, private IP, and EBS volume, making it ideal for stateful applications. Memory tip: think "same volume, same IP, automatic recovery is the key."
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. A key principle to apply: eC2 automatic recovery restarts an instance on new hardware.. 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 runs a stateful application on a single Amazon EC2 instance with an attached EBS volume. The SysOps administrator needs to ensure that in the event of an instance failure, a new instance can be launched quickly with the same data. The Recovery Point Objective (RPO) is 15 minutes and the Recovery Time Objective (RTO) is 30 minutes. Which strategy should the administrator implement?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure an Amazon EC2 automatic recovery action using a CloudWatch alarm
Option A is correct because Amazon EC2 automatic recovery, triggered by a CloudWatch alarm based on status checks, can restart the instance on new hardware while preserving the attached EBS volume and its data. This meets the RPO of 15 minutes (data is current on the EBS volume) and the RTO of 30 minutes (recovery is typically within a few minutes). The stateful application remains intact because the same EBS volume is reattached to the replacement instance.
Key principle: EC2 automatic recovery restarts an instance on new hardware.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure an Amazon EC2 automatic recovery action using a CloudWatch alarm
Why this is correct
Automatic recovery restores the instance with its attached volumes and data, achieving both low RTO and zero RPO.
Related concept
EC2 automatic recovery restarts an instance on new hardware.
- ✗
Schedule EBS snapshots every 15 minutes and use a Lambda function to launch a new instance from the latest snapshot
Why it's wrong here
This meets the RPO of 15 minutes but the RTO may exceed 30 minutes due to snapshot restore and instance boot times.
- ✗
Use an Auto Scaling group with a custom AMI that is updated every 15 minutes
Why it's wrong here
Creating an AMI every 15 minutes is time-consuming and may not capture all data changes; AMI creation also causes instance reboot if using root volume.
- ✗
Use an Application Load Balancer with health checks to redirect traffic to a standby instance
Why it's wrong here
An Application Load Balancer only distributes traffic; it does not handle stateful failover and the standby instance would not have the same data without additional replication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often overcomplicate the solution by choosing snapshot-based or AMI-based recovery strategies, failing to recognize that EC2 automatic recovery directly addresses instance failure while preserving the existing EBS volume and its stateful data without any data loss or manual intervention.
Detailed technical explanation
How to think about this question
EC2 automatic recovery uses CloudWatch alarms monitoring the StatusCheckFailed metric (instance status or system status). When a system status check fails (indicating underlying hardware or network issues), the recovery action stops and starts the instance on new healthy hardware, preserving the instance ID, private IP, Elastic IP, and all attached EBS volumes. The recovery typically completes within 2–5 minutes, well within the 30-minute RTO, and the EBS volume retains all data written up to the moment of failure, meeting the 15-minute RPO.
KKey Concepts to Remember
- EC2 automatic recovery restarts an instance on new hardware.
- It preserves instance ID, private IP, and attached EBS volumes.
- Automatic recovery is triggered by CloudWatch instance status checks.
- It provides near-zero RPO for stateful single-instance applications.
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
EC2 automatic recovery restarts an instance on new hardware.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Review eC2 automatic recovery restarts an instance on new hardware., then practise related SOA-C02 questions on the same topic to reinforce the concept.
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Reliability and Business Continuity — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Reliability and Business Continuity — This question tests Reliability and Business Continuity — EC2 automatic recovery restarts an instance on new hardware..
What is the correct answer to this question?
The correct answer is: Configure an Amazon EC2 automatic recovery action using a CloudWatch alarm — Option A is correct because Amazon EC2 automatic recovery, triggered by a CloudWatch alarm based on status checks, can restart the instance on new hardware while preserving the attached EBS volume and its data. This meets the RPO of 15 minutes (data is current on the EBS volume) and the RTO of 30 minutes (recovery is typically within a few minutes). The stateful application remains intact because the same EBS volume is reattached to the replacement instance.
What should I do if I get this SOA-C02 question wrong?
Review eC2 automatic recovery restarts an instance on new hardware., then practise related SOA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
EC2 automatic recovery restarts an instance on new hardware.
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Last reviewed: Jun 11, 2026
This SOA-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SOA-C02 exam.
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