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.
Which TWO of the following are common challenges in SSD forensics that can hinder data recovery?
File fragmentation
Why wrong: Fragmentation is not unique to SSDs and can be dealt with by file systems.
TRIM
TRIM erases blocks upon deletion, preventing recovery.
Bad sectors
Why wrong: Bad sectors are a hardware issue, not specific to SSD forensics challenges.
NTFS permissions
Why wrong: Permissions affect access control, not data recovery.
Wear levelling
Wear levelling distributes writes, making it harder to locate data.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
TRIM
TRIM is a command that allows an operating system to inform an SSD which data blocks are no longer in use and can be wiped internally. When TRIM is enabled, the SSD's controller immediately erases those blocks, making the original data unrecoverable by forensic tools because the physical cells are reset to an unprogrammed state. This directly hinders data recovery because the data is permanently removed at the hardware level before any forensic acquisition can occur.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
File fragmentation
Why it's wrong here
Fragmentation is not unique to SSDs and can be dealt with by file systems.
TRIM
Why this is correct
TRIM erases blocks upon deletion, preventing recovery.
Related concept
Read the scenario before looking for a memorised answer.
Bad sectors
Why it's wrong here
Bad sectors are a hardware issue, not specific to SSD forensics challenges.
NTFS permissions
Why it's wrong here
Permissions affect access control, not data recovery.
Wear levelling
Why this is correct
Wear levelling distributes writes, making it harder to locate data.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
EC-Council often tests the misconception that file fragmentation (Option A) is a major SSD forensic challenge, but the trap is that fragmentation is handled internally by the SSD controller and does not impede forensic recovery like TRIM and wear levelling do.
Detailed technical explanation
Wear levelling distributes write and erase cycles across all NAND flash cells to prevent premature wear of any single block, but this means that the logical-to-physical mapping maintained by the SSD controller is constantly changing. When a file is deleted, the controller may remap the logical block to a different physical location, and the original physical cells may be erased as part of garbage collection or TRIM, making it impossible to recover the original data even with advanced chip-off techniques. In a real-world scenario, a forensic examiner might acquire an SSD image only to find that TRIM has already zeroed out the deleted file's LBAs, leaving no recoverable remnants.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Storage Forensics and File System Analysis — This question tests Storage Forensics and File System Analysis — Read the scenario before looking for a memorised answer..
The correct answer is: TRIM — TRIM is a command that allows an operating system to inform an SSD which data blocks are no longer in use and can be wiped internally. When TRIM is enabled, the SSD's controller immediately erases those blocks, making the original data unrecoverable by forensic tools because the physical cells are reset to an unprogrammed state. This directly hinders data recovery because the data is permanently removed at the hardware level before any forensic acquisition can occur.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 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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