- A
Running 'scalpel' to extract fragments and reassemble based on metadata
Why wrong: Scalpel is a carving tool, not needed here because directory entry exists.
- B
Using the 'foremost' tool to perform file carving based on file headers and footers
Why wrong: File carving is necessary when directory entries are lost, but here the directory entry is intact and deleted.
- C
Using 'dd' to create a raw image and then 'photorec' to recover based on file signatures
Why wrong: PhotoRec is a carving tool, used when file system metadata is damaged or missing.
- D
Editing the directory entry's first byte from 0xE5 to the original character and recalculating the FAT chain
This restores the deleted file's directory entry, making it visible again. The FAT chain is usually still valid.
Quick Answer
The answer is editing the directory entry's first byte from 0xE5 to the original character and recalculating the FAT chain. This technique is most effective for FAT32 deleted file recovery because when a file is deleted, the operating system does not erase the data clusters; it simply marks the directory entry as available by writing 0xE5 in the first byte. As long as those clusters remain unoverwritten, restoring the original first byte and following the File Allocation Table chain allows the file system to see the file as intact again. On the CHFI exam, this concept tests your understanding of how the FAT32 file system handles deletion versus data destruction, and it often appears as a distractor against file carving—which is only needed when directory entries are missing or clusters are fragmented. A common trap is assuming recovery always requires carving tools, but here the directory metadata is salvageable. Memory tip: think of 0xE5 as a tombstone; remove it, and the file rises.
CHFI Storage Forensics and File System Analysis Practice Question
This CHFI practice question tests your understanding of storage forensics and file system analysis. 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.
During a forensic investigation, an analyst needs to recover recently deleted files from a FAT32 partition. Which of the following techniques is MOST effective for recovering files whose directory entries have been marked as deleted but the clusters have not yet been overwritten?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Editing the directory entry's first byte from 0xE5 to the original character and recalculating the FAT chain
FAT32 marks deleted files by setting the first byte of the directory entry to 0xE5. If the clusters are not overwritten, the file can be recovered by restoring the original first byte and using the FAT chain. File carving is used when directory entries are gone or clusters are fragmented.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Running 'scalpel' to extract fragments and reassemble based on metadata
Why it's wrong here
Scalpel is a carving tool, not needed here because directory entry exists.
- ✗
Using the 'foremost' tool to perform file carving based on file headers and footers
Why it's wrong here
File carving is necessary when directory entries are lost, but here the directory entry is intact and deleted.
- ✗
Using 'dd' to create a raw image and then 'photorec' to recover based on file signatures
Why it's wrong here
PhotoRec is a carving tool, used when file system metadata is damaged or missing.
- ✓
Editing the directory entry's first byte from 0xE5 to the original character and recalculating the FAT chain
Why this is correct
This restores the deleted file's directory entry, making it visible again. The FAT chain is usually still valid.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
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Storage Forensics and File System Analysis — study guide chapter
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FAQ
Questions learners often ask
What does this CHFI question test?
Storage Forensics and File System Analysis — This question tests Storage Forensics and File System Analysis — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Editing the directory entry's first byte from 0xE5 to the original character and recalculating the FAT chain — FAT32 marks deleted files by setting the first byte of the directory entry to 0xE5. If the clusters are not overwritten, the file can be recovered by restoring the original first byte and using the FAT chain. File carving is used when directory entries are gone or clusters are fragmented.
What should I do if I get this CHFI question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related CHFI NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 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.
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