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UGC-NET | UGC NET CS 2014 Dec - III | Question 1
A hierarchical memory system that uses cache memory has cache access time of 50 nano seconds, main memory access time of 300 nano seconds, 75% of memory requests are for read, hit ratio of 0.8 for read access and the write-through scheme is used. What will be the average access time of the system both for read and write requests ?
(A)
157.5 n.sec.
(B)
110 n.sec.
(C)
75 n.sec.
(D)
82.5 n.sec.
Answer
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