312-49 · Question #239
312-49 Question #239: Real Exam Question with Answer & Explanation
The correct answer is B: Optical. Magnetic media (hard drives, floppy disks, magnetic tapes) store data by altering magnetic particles, so a strong magnet (degausser) can effectively erase them. CDs and DVDs, however, store data optically — using microscopic pits and lands burned or pressed into a reflective la
Question
An employee is attempting to wipe out data stored on a couple of compact discs (CDs) and digital video discs (DVDs) by using a large magnet. You inform him that this method will not be effective in wiping out the data because CDs and DVDs are _________ media used to store large amounts of data and are not affected by the magnet.
Options
- AMagnetic
- BOptical
- CAnti-Magnetic
- DLogical
Explanation
Magnetic media (hard drives, floppy disks, magnetic tapes) store data by altering magnetic particles, so a strong magnet (degausser) can effectively erase them. CDs and DVDs, however, store data optically — using microscopic pits and lands burned or pressed into a reflective layer, read by a laser. They contain no magnetic material whatsoever. A magnet has absolutely no effect on optically encoded data. To destroy data on optical discs, physical destruction (shredding, grinding) or high-intensity UV exposure is required.
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