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UGC-NET | UGC NET CS 2016 Aug – III | Question 53

  • Last Updated : 18 Apr, 2018

Consider a file currently consisting of 50 blocks. Assume that the file control block and the index block is already in memory. If a block is added at the end (and the block information to be added is stored in memory), then how many disk I/O operations are required for indexed (single-level) allocation strategy?
(A) 1
(B) 101
(C) 27
(D) 0


Answer: (A)

Explanation: According to question file control block and the index block is already in memory. So, we don’t need to transfer them from anywhere else for further operation. If a block is added at the end (and the block information to be added is stored in memory), this is a single operation. So we need only one I/O operation required for indexed (single-level) allocation strategy.
So, option (A) is correct.

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