SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. 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.
During an incident response, a security engineer needs to preserve the state of an EC2 instance's root volume for forensic analysis. The instance is still running. Which action should be taken to ensure the data is preserved without altering it?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a snapshot of the root volume.
Creating a snapshot of the root volume is the correct action because it captures a point-in-time, crash-consistent copy of the volume's data without requiring the instance to be stopped or the volume to be detached. This preserves the current state of the running instance for forensic analysis while ensuring the data is not altered by the snapshot process itself, as AWS snapshots are read-only and do not modify the source volume.
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.
✗
Stop the instance and then create an AMI.
Why it's wrong here
Stopping the instance changes the state and may trigger shutdown scripts.
✓
Create a snapshot of the root volume.
Why this is correct
Snapshot captures the current state without altering data.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use dd if=/dev/xvda over SSH to copy the volume.
Why it's wrong here
Reading the volume over SSH may modify access times and is slow.
✗
Detach the root volume and attach it to a forensics instance.
Why it's wrong here
Detaching a running instance may cause file system inconsistency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think stopping the instance (Option A) is necessary to ensure data consistency, but they overlook that stopping alters the system state and that a snapshot of a running instance is still a valid, unaltered point-in-time copy for forensic purposes.
Detailed technical explanation
How to think about this question
AWS EBS snapshots are incremental, block-level copies that capture only changed blocks since the last snapshot, but the first snapshot after creation captures the entire volume. For forensic integrity, it is critical to note that snapshots are crash-consistent, meaning they capture the state of the file system as if the system crashed, which may include incomplete writes; for a fully consistent forensic image, the volume should be frozen (e.g., via fsfreeze) before snapshotting, but this is not required by the question's scenario. In real-world incident response, a snapshot is often preferred over a dd copy because it avoids network bandwidth consumption and provides a verifiable, AWS-managed copy that can be used to launch a forensics instance without altering the original evidence.
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 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 exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a snapshot of the root volume. — Creating a snapshot of the root volume is the correct action because it captures a point-in-time, crash-consistent copy of the volume's data without requiring the instance to be stopped or the volume to be detached. This preserves the current state of the running instance for forensic analysis while ensuring the data is not altered by the snapshot process itself, as AWS snapshots are read-only and do not modify the source volume.
What should I do if I get this SCS-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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Question Discussion
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