The answer is to execute docker logs to capture container logs, create a container image, and export the container as a tar archive. These three actions preserve the ephemeral filesystem, runtime output, and configuration state of a Docker container without altering the evidence. In container forensics, the filesystem is volatile by design—containers write to a writable layer that disappears on deletion—so imaging via docker commit or export freezes that layer, while docker logs captures stdout and stderr that would otherwise be lost. On the Computer Hacking Forensic Investigator CHFI exam, this question tests your understanding of live response vs. preservation: a common trap is to inspect a running container with docker exec, which modifies the filesystem and violates forensic integrity. Remember the mnemonic “LIE” for Logs, Image, Export—never delete or inspect live.
CHFI Application, Email and Cloud Forensics Practice Question
This CHFI practice question tests your understanding of application, email and cloud forensics. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An incident response team is investigating a breach involving a Docker container. Which THREE of the following actions should the team take to preserve forensic evidence?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use docker export to save the container's filesystem as a tar archive
Creating a container image preserves the filesystem and configuration. Saving logs via docker logs captures runtime output. Exporting the container as a tar archive preserves the filesystem. Inspecting while running is not safe for preservation. Deleting removes evidence.
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 container immediately to prevent further compromise
Why it's wrong here
Stopping may lose volatile data and is not the best first step; image and logs should be collected first.
✓
Use docker export to save the container's filesystem as a tar archive
Why this is correct
Exports the container's filesystem for offline analysis.
Related concept
Read the scenario before looking for a memorised answer.
✓
Run docker commit to create an image from the container
Why this is correct
Creates an image capturing the container's current state.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use docker inspect to examine container metadata before stopping
Why it's wrong here
Inspect is useful but does not preserve the filesystem, and it's better to stop first.
✓
Execute docker logs to capture container logs
Why this is correct
Logs capture application and system output.
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 practitioner preparing for the CHFI exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CHFI question in full detail.
Identify which CHFI 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.
Application, Email and Cloud Forensics — This question tests Application, Email and Cloud Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use docker export to save the container's filesystem as a tar archive — Creating a container image preserves the filesystem and configuration. Saving logs via docker logs captures runtime output. Exporting the container as a tar archive preserves the filesystem. Inspecting while running is not safe for preservation. Deleting removes evidence.
What should I do if I get this CHFI question wrong?
Identify which CHFI 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A forensic examiner is investigating a Docker container suspected of being used for malicious activity. Which of the following is the BEST approach to collect volatile evidence from the container without altering its state?
medium
A.Stop the container immediately and then export its filesystem with 'docker export'
B.Create a memory dump of the host machine and extract container memory
✓ C.Use 'docker commit' to create an image of the container's current state
D.Execute 'docker exec' to access the container shell and run forensic tools
Why C: Using 'docker commit' creates a snapshot of the container's filesystem without stopping the container, preserving volatile evidence.
Last reviewed: Jun 21, 2026
Question Discussion
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This CHFI practice question is part of Courseiva's free EC-Council 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 CHFI exam.
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