CERTIFIED-IN-CYBERSECURITY · Question #528
Which method eliminates residual physical effects from writing original values?
The correct answer is D. Clearing. Clearing (also called sanitization) removes data in a way that makes it unrecoverable using standard tools, but it specifically addresses residual physical effects left by the original magnetic or electrical writing process - for example, using multiple overwrite passes or…
Question
Which method eliminates residual physical effects from writing original values?
Options
- ADestruction
- BPurging
- COverwriting
- DClearing
How the community answered
(15 responses)- A7% (1)
- D93% (14)
Explanation
Clearing (also called sanitization) removes data in a way that makes it unrecoverable using standard tools, but it specifically addresses residual physical effects left by the original magnetic or electrical writing process - for example, using multiple overwrite passes or degaussing to eliminate remanence on magnetic media. Destruction (A) physically destroys the media entirely. Purging (B) is a stronger form of sanitization that makes data unrecoverable even with laboratory techniques, but it goes beyond just eliminating residual physical effects. Overwriting (C) writes new data on top of old data but may not eliminate all physical residual effects from the original writes, which is why clearing with specific techniques is the more precise answer here.
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