Question 1mediummultiple choice
Read the full NAT/PAT explanation →Question 769 of 1,000
Quick Answer
The answer is a sparse file. This is the most likely explanation because a sparse file in NTFS has a logical size that is far larger than the actual data stored, so Windows Explorer reports the logical size as zero bytes, while the file system still allocates a minimum cluster—typically 4 KB—as size on disk to hold metadata or a small amount of residual data. On the Computer Hacking Forensic Investigator CHFI exam, this concept tests your understanding of NTFS file system artifacts and how they can hide data in plain sight; a common trap is assuming a zero-byte file is empty, when in fact it may contain hidden or fragmented data within that allocated slack space. Remember the memory tip: “Zero logical, four physical—sparse files are not invisible, just economical.”
CHFI Storage Forensics and File System Analysis Practice Question
This CHFI practice question tests your understanding of storage forensics and file system analysis. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 examination of a Windows system, an analyst finds a file that appears to be zero bytes in size when viewed in Windows Explorer, but the file's properties show a size on disk of 4 KB. What is the most likely explanation?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
✓
The file is a sparse file
Sparse files in NTFS have a logical size larger than the allocated disk space. The file may appear as zero bytes but occupy slack space due to allocation.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
- →
Storage Forensics and File System Analysis — study guide chapter
Learn the concepts, then practise the questions
- →
Storage Forensics and File System Analysis 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
Related CHFI practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Computer Forensics Investigation Process practice questions
Practise CHFI questions linked to Computer Forensics Investigation Process.
Computer Forensics Fundamentals and Process practice questions
Practise CHFI questions linked to Computer Forensics Fundamentals and Process.
Storage Forensics and File System Analysis practice questions
Practise CHFI questions linked to Storage Forensics and File System Analysis.
Incident Response and First Responder Skills practice questions
Practise CHFI questions linked to Incident Response and First Responder Skills.
Computer Forensics Lab practice questions
Practise CHFI questions linked to Computer Forensics Lab.
Evidence Acquisition and Duplication practice questions
Practise CHFI questions linked to Evidence Acquisition and Duplication.
OS and Network Forensics practice questions
Practise CHFI questions linked to OS and Network Forensics.
OS and File System Forensics practice questions
Practise CHFI questions linked to OS and File System Forensics.
Application, Email and Cloud Forensics practice questions
Practise CHFI questions linked to Application, Email and Cloud Forensics.
Mobile and Malware Forensics practice questions
Practise CHFI questions linked to Mobile and Malware Forensics.
Network and Cloud Forensics practice questions
Practise CHFI questions linked to Network and Cloud Forensics.
Database and Application Forensics practice questions
Practise CHFI questions linked to Database and Application Forensics.
Practice this exam
Start a free CHFI practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
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: The file is a sparse file — Sparse files in NTFS have a logical size larger than the allocated disk space. The file may appear as zero bytes but occupy slack space due to allocation.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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 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.
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.