CERTIFIED-IN-CYBERSECURITY · Question #528
CERTIFIED-IN-CYBERSECURITY Question #528: Real Exam Question with Answer & Explanation
The correct answer is D: Clearing. Clearing is a method used to eliminate the residual physical effects of writing original values to a storage device. This process involves overwriting the data with zeros or ones to ensure the original data cannot be retrieved. For example, when a hard disk is erased, all previou
Question
Which method eliminates residual physical effects from writing original values?
Options
- ADestruction
- BPurging
- COverwriting
- DClearing
Explanation
Clearing is a method used to eliminate the residual physical effects of writing original values to a storage device. This process involves overwriting the data with zeros or ones to ensure the original data cannot be retrieved. For example, when a hard disk is erased, all previously stored data is overwritten, making it impossible to recover the original data (see ISC2 Study Guide, Chapter 5, Module 1). On the other hand, purging is more rigorous than wiping, in which the storage media is declassified to be used in a less secure environment. Destruction physically destroys the storage media so it cannot be used again. Overwriting is used in the wiping process, but it does not remove the remaining physical effects. It is part of the wiping process, not a stand-
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