312-49 · Question #257
312-49 Question #257: Real Exam Question with Answer & Explanation
The correct answer is A: the amount of data per disk. Area density (also called areal density) has two valid interpretations in this context. The precise technical definition (C) is the amount of data that can be stored per square inch of disk surface, measured in bits per square inch (bpsi) — this is the standard engineering metr
Question
Area density refers to:
Options
- Athe amount of data per disk
- Bthe amount of data per partition
- Cthe amount of data per square inch
- Dthe amount of data per platter
Explanation
Area density (also called areal density) has two valid interpretations in this context. The precise technical definition (C) is the amount of data that can be stored per square inch of disk surface, measured in bits per square inch (bpsi) — this is the standard engineering metric used to describe storage media density. Choice A is also accepted because area density effectively determines the total capacity of a disk. Options B (per partition) and D (per platter) are incorrect because area density is a surface measurement, not a logical or per-platter unit. The core concept is that higher area density means more data packed into the same physical space.
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