Direction: A hard disk has 63 sectors per track, 10 platters each with 2 recording surfaces and 1000 cylinders. The address of a sector is given as a triple (c, h, s), where c is the cylinder number, h is the surface number and s is the sector number. Thus, the 0th sector is addressed as ❮ 0,0,0 ❯ the 1st sector as ❮ 0,0,1 ❯, and so on.
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How many 32 k × 1 RAM chips are needed to provide a memory capacity of 256 kbyte?
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- 8
- 32
- 64
- 128
- 8
Correct Option: C
As given, basic RAM is 32 k × 1 and we have to design a RAM of 256 k × 8.
Therefore, number of chips required = 256 k × 8 /(32 k × 1)
= 245 × 1024 × 8/32 × 1024 × 1) (Multiplying and dividing by 1024)
= 64 = 8 × 8
Means, 64 = 8 parallel lines × 8 serial RAM chips.
