220-802 Question #1009: Real Exam Question with Answer & Explanation

The correct answer is A: Electromagnet. An electromagnet (degaussing) exposes the magnetic drive platters to an intense magnetic field that randomizes all magnetic domains, destroying the recorded data and rendering the drive permanently unreadable. Physical shredding mechanically destroys the drive into small pieces,

Question

Which of the following would remove all data from a drive and ensure that the drive was no longer readable? (Select TWO).

Options

AElectromagnet
BOverwriting
CFormat
DRepartition
EShredding

Explanation

An electromagnet (degaussing) exposes the magnetic drive platters to an intense magnetic field that randomizes all magnetic domains, destroying the recorded data and rendering the drive permanently unreadable. Physical shredding mechanically destroys the drive into small pieces, making data recovery impossible. Overwriting replaces existing data with new data, so the drive remains functional and readable - just with different content. A standard format typically only removes file system pointers without securely wiping underlying data, and the drive remains usable. Repartitioning modifies partition tables but does not erase actual data. Only degaussing and shredding guarantee the drive cannot be read afterward.

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