COMPTIA A+ Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 525

What formula is used to calculate disk size?

# of Cylinders * Heads * # of sectors/track * 512bytes/sector

The formula used to calculate disk size is the product of three factors the number of cylinders, the number of heads, and the number of sectors per track. This is because the total size of a disk is determined by the number of tracks on each head, the number of heads, and the number of sectors per track. Options B, C, and D are incorrect because they either add, divide, or subtract instead of multiplying these three essential factors. This would result in an incorrect calculation of the disk size.

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# of Cylinders + Heads + # of sectors/track * 512bytes/sector

# of Cylinders * Heads / # of sectors/track * 512bytes/sector

# of Cylinders * Heads - # of sectors/track * 512bytes/sector

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