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UGC-NET | UGC NET CS 2018 Dec – II | Question 39

  • Last Updated : 07 Oct, 2020

Consider a disk pack with 32 surfaces, 64 tracks and 512 sectors per pack. 256 bytes of data are stored in a bit serial manner in a sector. The number of bits required to specify a particular sector in the disk is
(A) 19
(B) 20
(C) 18
(D) 22


Answer: (B)

Explanation: To calculate number of bits required to access a sector, we need to know total number of sectors.

Total number of sectors = 32 surfaces X 64 tracks X 512 sectors = 2^20

So the number of bits required to access a sector is 20.

Option (B) is correct.

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