This CHFI practice question tests your understanding of computer forensics fundamentals and process. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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 a forensic investigation, the analyst needs to create a forensic image of a hard drive that also hashes the data during acquisition. Which command-line tool would be MOST appropriate for this task?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
dd
Why wrong: Plain dd does not automatically generate hashes; requires separate commands.
fdisk
Why wrong: fdisk is a partitioning tool, not for imaging.
memdump
Why wrong: memdump captures volatile memory, not disk images.
dcfldd
dcfldd can compute hashes on-the-fly, ensuring integrity.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
dcfldd
dcfldd is a modified version of dd that includes built-in hashing (e.g., MD5, SHA-1, SHA-256) during the imaging process, allowing the analyst to verify data integrity in real time without a separate hashing step. This makes it the most appropriate tool for creating a forensic image that also hashes the data during acquisition.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
dd
Why it's wrong here
Plain dd does not automatically generate hashes; requires separate commands.
fdisk
Why it's wrong here
fdisk is a partitioning tool, not for imaging.
memdump
Why it's wrong here
memdump captures volatile memory, not disk images.
dcfldd
Why this is correct
dcfldd can compute hashes on-the-fly, ensuring integrity.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the distinction between dd and dcfldd, trapping candidates who assume dd is sufficient because it can create a raw image, ignoring the explicit requirement for integrated hashing during acquisition.
Trap categories for this question
Command / output trap
Plain dd does not automatically generate hashes; requires separate commands.
Detailed technical explanation
dcfldd extends dd by adding options like 'hash=md5' or 'hash=sha256' to compute the hash on-the-fly as data is read, and it can also split output into chunks (e.g., for large drives) while maintaining a continuous hash. In real-world forensic acquisitions, this ensures that the hash covers every bit exactly as it was read, eliminating the risk of hash mismatches due to post-acquisition file system changes or read errors. The tool also supports multiple hash algorithms simultaneously and can log hash values to a separate file for chain-of-custody documentation.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Computer Forensics Fundamentals and Process — study guide chapter
Learn the concepts, then practise the questions
Computer Forensics Fundamentals and Process practice questions
Targeted practice on this topic area only
All CHFI questions
1,000 questions across all exam domains
Computer Hacking Forensic Investigator CHFI study guide
Full concept coverage aligned to exam objectives
CHFI practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise CHFI questions linked to Computer Forensics Investigation Process.
Practise CHFI questions linked to Computer Forensics Fundamentals and Process.
Practise CHFI questions linked to Storage Forensics and File System Analysis.
Practise CHFI questions linked to Incident Response and First Responder Skills.
Practise CHFI questions linked to Computer Forensics Lab.
Practise CHFI questions linked to Evidence Acquisition and Duplication.
Practise CHFI questions linked to OS and Network Forensics.
Practise CHFI questions linked to OS and File System Forensics.
Practise CHFI questions linked to Application, Email and Cloud Forensics.
Practise CHFI questions linked to Mobile and Malware Forensics.
Practise CHFI questions linked to Network and Cloud Forensics.
Practise CHFI questions linked to Database and Application Forensics.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Computer Forensics Fundamentals and Process — This question tests Computer Forensics Fundamentals and Process — Read the scenario before looking for a memorised answer..
The correct answer is: dcfldd — dcfldd is a modified version of dd that includes built-in hashing (e.g., MD5, SHA-1, SHA-256) during the imaging process, allowing the analyst to verify data integrity in real time without a separate hashing step. This makes it the most appropriate tool for creating a forensic image that also hashes the data during acquisition.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
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 →
Last reviewed: Jun 24, 2026
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.