The answer is using `docker save` to export the image as a tar file and extract layers, combined with `docker history` to review the build commands. These two techniques are correct because `docker save` preserves the full image structure, allowing you to untar and inspect each layer’s filesystem for hidden malware, while `docker history` reveals the exact commands executed during the build, helping you spot suspicious steps like altered base images or injected binaries. On the Computer Hacking Forensic Investigator CHFI exam, this question tests your ability to distinguish between container forensics tools—a common trap is confusing `docker export`, which flattens a container’s filesystem into a single layer, with `docker save`, which retains the layered architecture critical for layer-by-layer analysis. Remember the mnemonic: “Save the layers, history reveals the players.”
CHFI Application, Email and Cloud Forensics Practice Question
This CHFI practice question tests your understanding of application, email and cloud forensics. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 forensic analyst is examining a Docker container image for malware. Which TWO techniques can help analyze the image layers?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use 'docker history' to view the build history of the image
'docker history' shows the build commands and layers, which helps identify suspicious steps. 'docker export' exports the container filesystem but not layers individually. 'docker save' saves the image as a tar, allowing layer extraction. 'docker inspect' shows metadata only. 'docker images' lists images.
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.
✓
Use 'docker history' to view the build history of the image
Why this is correct
Shows each layer and the command that created it.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use 'docker images' to list all images
Why it's wrong here
Lists images but does not analyze layers.
✗
Use 'docker inspect' to view the image metadata
Why it's wrong here
Inspect shows configuration, not the layers themselves.
✓
Use 'docker save' to export the image as a tar file and extract layers
Why this is correct
Saves the image as a tar, which contains layer directories.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use 'docker export' on a running container
Why it's wrong here
Exports filesystem of a container, not image layers.
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.
Trap categories for this question
Command / output trap
Inspect shows configuration, not the layers themselves.
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 history' to view the build history of the image — 'docker history' shows the build commands and layers, which helps identify suspicious steps. 'docker export' exports the container filesystem but not layers individually. 'docker save' saves the image as a tar, allowing layer extraction. 'docker inspect' shows metadata only. 'docker images' lists images.
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 →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.