Quick Answer
The answer is to configure EC2 Auto Recovery with a CloudWatch alarm. This feature works by monitoring the instance’s system status checks; when a hardware failure or impairment is detected, CloudWatch triggers an alarm that automatically recovers the instance by restarting it on healthy hardware, preserving its private IP, Elastic IP, and instance ID. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of operational resilience versus other EC2 protections—a common trap is confusing termination protection (which only prevents accidental deletion) or placement groups (which optimize network performance) with recovery. Remember that Auto Recovery is specifically tied to the “StatusCheckFailed_System” metric, not instance-level checks. A useful memory tip: “System failure? Auto Recovery will save her.”
This DOP-C02 practice question tests your understanding of resilient cloud solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 DevOps engineer needs to ensure that an application running on EC2 can automatically recover from an underlying hardware failure without manual intervention. Which AWS feature should be enabled?
Enable termination protection
Why wrong: Does not recover from hardware failure.
Configure EC2 Auto Recovery with a CloudWatch alarm
Recovers instance automatically on hardware failure.
Configure an Auto Scaling group with a minimum size of 1
Why wrong: Auto Scaling replaces terminated instances, but doesn't recover the same instance.
Enable CloudWatch detailed monitoring
Why wrong: Only provides metrics, not recovery.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Configure EC2 Auto Recovery with a CloudWatch alarm
EC2 Auto Recovery automatically recovers an instance if it becomes impaired due to underlying hardware failure. Option B is wrong because termination protection prevents accidental deletion, not recovery. Option C is wrong because detailed monitoring is for CloudWatch. Option D is wrong because placement groups affect performance, not recovery.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Enable termination protection
Why it's wrong here
Does not recover from hardware failure.
Configure EC2 Auto Recovery with a CloudWatch alarm
Why this is correct
Recovers instance automatically on hardware failure.
Related concept
Static NAT maps one inside address to one outside address.
Configure an Auto Scaling group with a minimum size of 1
Why it's wrong here
Auto Scaling replaces terminated instances, but doesn't recover the same instance.
Enable CloudWatch detailed monitoring
Why it's wrong here
Only provides metrics, not recovery.
Common exam traps
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.
Detailed technical explanation
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.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
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FAQ
Resilient Cloud Solutions — This question tests Resilient Cloud Solutions — Static NAT maps one inside address to one outside address..
The correct answer is: Configure EC2 Auto Recovery with a CloudWatch alarm — EC2 Auto Recovery automatically recovers an instance if it becomes impaired due to underlying hardware failure. Option B is wrong because termination protection prevents accidental deletion, not recovery. Option C is wrong because detailed monitoring is for CloudWatch. Option D is wrong because placement groups affect performance, not recovery.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DOP-C02 NAT questions on configuration and troubleshooting.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 20, 2026
This DOP-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 DOP-C02 exam.
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