Question: Table below shows the access time and accessed counter for each of the block inside a disk cache. Block A Last Access Time 7/12/2021, 17:05:23

Table below shows the access time and accessed counter for each

Table below shows the access time and accessed counter for each of the block inside a disk cache. Block A Last Access Time 7/12/2021, 17:05:23 7/12/2021, 14:12:63 7/12/2021, 10:12:63 7/12/2021, 18:12:63 7/12/2021, 1:12:63 Counter 10 23 15 B 11 D E 21 (a) Explain about Least Frequently Used (LFU) policy and state which block will be replaced if it is based on LFU. (b) Explain about Least Recently Used (LRU) policy and state which block will be replaced if it is based on LRU. [6 marks]

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