The answer is two valid justifications: the computer is in a hazardous environment, such as flooding, or it is actively running a data wiping program. These are correct because a first responder must power off a computer to prevent imminent physical damage to the hardware or to halt the irreversible destruction of evidence on non-volatile storage. In the case of a data wiping tool, cutting power stops the active overwriting of sectors, preserving remaining data that would otherwise be lost forever—volatile memory is secondary here. On the CHFI exam, this question tests your understanding of when evidence preservation overrides the need to capture live system state, a critical distinction in first responder protocol. A common trap is assuming you should always capture RAM first; instead, prioritize stopping active destruction or physical threats. Memory tip: think “HALT the HARM”—Hazardous environment or Active wiping program justify the power-off.
CHFI Computer Forensics Fundamentals and Process Practice Question
This CHFI practice question tests your understanding of computer forensics fundamentals and process. 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.
Which TWO of the following are valid justifications for a first responder to power off a computer at a crime scene? (Select TWO)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The computer is destroying evidence (e.g., running a data wiping program)
Option C is correct because if a computer is actively running a data wiping program (e.g., a tool that overwrites storage sectors with zeros or random data), leaving it powered on will cause the irreversible destruction of potential evidence. A first responder must immediately cut power to halt the wiping process and preserve the remaining data, as volatile memory (RAM) is not the primary concern in this scenario—the non-volatile storage is being actively sanitized.
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.
✗
To prevent the computer from overheating
Why it's wrong here
Overheating is not a common justification; proper cooling should be arranged.
✗
To save time during the investigation
Why it's wrong here
This is not a valid justification; integrity is paramount.
✓
The computer is destroying evidence (e.g., running a data wiping program)
Why this is correct
Powering off can stop the destruction, but ideally capture volatile data first if possible.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✓
The computer is in a hazardous environment (e.g., flooding)
Why this is correct
Safety risks may necessitate powering off to prevent electrical hazards.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The computer is actively being used to commit a crime
Why it's wrong here
If actively used, you may need to capture volatile data first, not power off.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the distinction between 'actively being used to commit a crime' (which requires live acquisition) and 'actively destroying evidence' (which justifies immediate power-off), causing candidates to mistakenly select Option E as a valid justification.
Detailed technical explanation
How to think about this question
Under the hood, data wiping programs like DBAN or Secure Erase use ATA Secure Erase commands or repeated write patterns to overwrite storage media at the hardware level. In a real-world scenario, a first responder might encounter a system running a script that calls the Windows 'cipher /w' command to overwrite free space; immediate power removal (via unplugging the power cord, not a graceful shutdown) stops the write operations mid-stream, potentially leaving partially overwritten sectors that can still be recovered using advanced forensic techniques like magnetic force microscopy.
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.
Computer Forensics Fundamentals and Process — This question tests Computer Forensics Fundamentals and Process — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The computer is destroying evidence (e.g., running a data wiping program) — Option C is correct because if a computer is actively running a data wiping program (e.g., a tool that overwrites storage sectors with zeros or random data), leaving it powered on will cause the irreversible destruction of potential evidence. A first responder must immediately cut power to halt the wiping process and preserve the remaining data, as volatile memory (RAM) is not the primary concern in this scenario—the non-volatile storage is being actively sanitized.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO of the following are valid reasons for a first responder to power off a computer system at a crime scene? (Select TWO)
medium
A.To save time during the investigation
B.To make it easier to transport the system
✓ C.When the system is actively destroying evidence (e.g., a data wiping program is running)
D.To prevent the destruction of volatile data by allowing it to be captured before shutdown
✓ E.When the system is a potential threat to first responders (e.g., a bomb or hazardous environment)
Why C: Option C is correct because if a system is actively running a data wiping program (e.g., a tool that overwrites sectors with zeros or random data per the Gutmann method or DoD 5220.22-M standard), immediate power-off is the only way to halt the destruction of evidence before it becomes unrecoverable. Pulling the power cord (hard shutdown) stops the wiping process in its tracks, preserving any data that has not yet been overwritten.
Last reviewed: Jun 30, 2026
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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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