CHFI Mobile and Malware Forensics Practice Question
This CHFI practice question tests your understanding of mobile and malware 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.
In Android forensics, which of the following acquisition methods provides the most complete and forensically sound image of the device's internal storage?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Physical extraction using a JTAG or chip-off technique
Physical extraction using a JTAG or chip-off technique provides the most complete and forensically sound image because it accesses the raw NAND flash memory at the hardware level, bypassing the operating system and any software-based restrictions. This method captures deleted data, unallocated space, and the entire file system structure, including areas not accessible via logical or file system extractions, ensuring a bit-for-bit copy of the internal storage.
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.
✗
Manual extraction through the user interface
Why it's wrong here
Manual extraction is limited to what the user can see and copy, and is not forensically sound.
✗
Logical extraction via ADB
Why it's wrong here
Logical extraction only copies accessible files and does not recover deleted data.
✗
File system extraction
Why it's wrong here
File system extraction provides more data than logical but not a full physical image.
✓
Physical extraction using a JTAG or chip-off technique
Why this is correct
Physical extraction captures the entire flash memory, including deleted files and unallocated space.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that logical extraction via ADB is sufficient for a complete forensic image, but candidates must recognize that only physical methods (JTAG/chip-off) capture the entire raw storage, including deleted and hidden data.
Detailed technical explanation
How to think about this question
JTAG (Joint Test Action Group) extraction uses the device's test access ports to directly interface with the NAND flash memory controller, allowing a forensic tool to read raw data without the OS booting; chip-off involves physically desoldering the NAND chip and reading it via a dedicated programmer. In practice, chip-off is essential for devices with broken screens or locked bootloaders, but it requires specialized equipment and can risk damaging the chip if not performed correctly, whereas JTAG is less invasive but may not work on all modern SoCs due to fused or disabled JTAG ports.
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 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.
Mobile and Malware Forensics — This question tests Mobile and Malware Forensics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Physical extraction using a JTAG or chip-off technique — Physical extraction using a JTAG or chip-off technique provides the most complete and forensically sound image because it accesses the raw NAND flash memory at the hardware level, bypassing the operating system and any software-based restrictions. This method captures deleted data, unallocated space, and the entire file system structure, including areas not accessible via logical or file system extractions, ensuring a bit-for-bit copy of the internal storage.
What should I do if I get this CHFI 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.
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.