- A
EC2 Auto Scaling
Why wrong: Auto Scaling launches new replacement instances from a launch template; it doesn't recover the same instance to its original state.
- B
Amazon EC2 Auto Recovery
EC2 Auto Recovery is a CloudWatch alarm action that automatically restores a failed instance with its original configuration, same instance ID, and attached volumes.
- C
Elastic Load Balancing health checks
Why wrong: ELB health checks route traffic away from unhealthy instances but don't automatically recover the failed instance.
- D
AWS Systems Manager Patch Manager
Why wrong: Patch Manager handles OS patching, not automated recovery from instance failures.
Question 144 of 1,024
CLF-C02 Cloud Concepts Practice Question
This CLF-C02 practice question tests your understanding of cloud concepts. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
The AWS Well-Architected Framework's Reliability pillar recommends automatically recovering from failure. Which AWS feature directly enables automated recovery when an EC2 instance status check fails?
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
✓
Amazon EC2 Auto Recovery
Amazon EC2 Auto Recovery is a feature that automatically recovers an impaired EC2 instance by restarting it on a new healthy host when a system status check fails. This directly aligns with the Reliability pillar's recommendation to automatically recover from failure without manual intervention.
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.
- ✗
EC2 Auto Scaling
Why it's wrong here
Auto Scaling launches new replacement instances from a launch template; it doesn't recover the same instance to its original state.
- ✓
Amazon EC2 Auto Recovery
Why this is correct
EC2 Auto Recovery is a CloudWatch alarm action that automatically restores a failed instance with its original configuration, same instance ID, and attached volumes.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Elastic Load Balancing health checks
Why it's wrong here
ELB health checks route traffic away from unhealthy instances but don't automatically recover the failed instance.
- ✗
AWS Systems Manager Patch Manager
Why it's wrong here
Patch Manager handles OS patching, not automated recovery from instance failures.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse EC2 Auto Recovery with EC2 Auto Scaling, assuming that Auto Scaling's health check replacement is the same as recovering the same instance, but Auto Recovery preserves the instance identity while Auto Scaling terminates and creates a new one.
Detailed technical explanation
How to think about this question
EC2 Auto Recovery relies on CloudWatch alarms that trigger when an EC2 status check fails (e.g., system status check indicating loss of network connectivity or power). The recovery action moves the instance to a new host while preserving its instance ID, private IP, Elastic IP, and EBS volumes, making it distinct from Auto Scaling's replacement behavior. This feature is only available for instances in a VPC and requires an IAM role to allow the recovery action.
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.
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
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 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. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
- →
Cloud Concepts — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Concepts — This question tests Cloud Concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon EC2 Auto Recovery — Amazon EC2 Auto Recovery is a feature that automatically recovers an impaired EC2 instance by restarting it on a new healthy host when a system status check fails. This directly aligns with the Reliability pillar's recommendation to automatically recover from failure without manual intervention.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This CLF-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 CLF-C02 exam.
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