The correct answer is that the device must be rooted and USB debugging must be enabled. These two conditions are required because the /data/data/ directory is protected by Linux user permissions and SELinux policies, meaning each app’s data is owned by its own UID and inaccessible to other users; only a root user (UID 0) can bypass these restrictions to read all application data, while USB debugging allows the forensic workstation to communicate with the device via ADB for command execution. On the Computer Hacking Forensic Investigator CHFI exam, this question tests your understanding of Android forensic acquisition prerequisites, often appearing as a trap where candidates mistakenly think only root is needed—remember that without USB debugging, ADB cannot issue the su command to escalate privileges. A useful memory tip is “Root for read, Debug for connect,” linking root to permission bypass and USB debugging to the ADB communication channel.
CHFI Mobile and Malware Forensics Practice Question
This CHFI practice question tests your understanding of mobile and malware forensics. 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.
A forensic examiner is analyzing an Android device and needs to extract application data from the /data/data/ directory. Which TWO conditions must be met to access this directory? (Select TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
USB debugging must be enabled
The /data/data/ directory on Android contains application private data, which is protected by Linux user permissions (UID/GID) and SELinux policies. USB debugging must be enabled (Option A) to allow the forensic workstation to communicate with the device via ADB (Android Debug Bridge) for command execution. The device must be rooted (Option B) because the /data/data/ directory is owned by the system and individual app UIDs, and only a root user (UID 0) can bypass these permissions to read all application data.
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.
✓
USB debugging must be enabled
Why this is correct
ADB requires USB debugging to be enabled.
Related concept
Read the scenario before looking for a memorised answer.
✓
The device must be rooted
Why this is correct
Root access is required to read /data/data/ as it is protected.
Related concept
Read the scenario before looking for a memorised answer.
✗
The device must be in recovery mode
Why it's wrong here
Recovery mode may allow ADB but is not strictly necessary if root is available in normal mode.
✗
The bootloader must be unlocked
Why it's wrong here
Unlocking the bootloader is needed for custom recoveries but not for ADB root access.
✗
The screen must be unlocked
Why it's wrong here
ADB can work with the screen locked if authorized, but root access still required.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the misconception that unlocking the bootloader or using recovery mode alone provides full filesystem access, but the key distinction is that root privileges are required to override Linux UID permissions, and USB debugging is required for ADB communication.
Detailed technical explanation
How to think about this question
Under the hood, Android uses a Linux kernel with discretionary access control (DAC) and mandatory access control (MAC) via SELinux. The /data/data/ directory is mounted with the nosuid, nodev, and noexec flags, and each app's subdirectory is owned by its respective UID (e.g., u0_a123). Even with USB debugging enabled, an ADB shell runs as the 'shell' user (UID 2000), which cannot read files owned by other UIDs. Rooting escalates privileges to UID 0, allowing the examiner to bypass DAC, but SELinux enforcing mode may still block access unless the kernel is patched or SELinux is set to permissive. In a real-world scenario, a forensic examiner might use a rooted device with ADB root or a custom recovery that mounts /data with root access, but the two conditions explicitly required for live extraction via ADB are USB debugging enabled and root access.
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: USB debugging must be enabled — The /data/data/ directory on Android contains application private data, which is protected by Linux user permissions (UID/GID) and SELinux policies. USB debugging must be enabled (Option A) to allow the forensic workstation to communicate with the device via ADB (Android Debug Bridge) for command execution. The device must be rooted (Option B) because the /data/data/ directory is owned by the system and individual app UIDs, and only a root user (UID 0) can bypass these permissions to read all application data.
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.
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Question Discussion
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