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GATE | GATE-CS-2015 (Set 2) | Question 65

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  • Difficulty Level : Medium
  • Last Updated : 02 May, 2019

A computer system implements a 40 bit virtual address, page size of 8 kilobytes, and a 128-entry translation look-aside buffer (TLB) organized into 32 sets each having four ways. Assume that the TLB tag does not store any process id. The
minimum length of the TLB tag in bits is _________
(A) 20
(B) 10
(C) 11
(D) 22


Answer: (D)

Explanation:

Total virtual address size = 40

Since there are 32 sets, set offset = 5

Since page size is 8kilobytes, word offset = 13

Minimum tag size = 40 - 5- 13 = 22


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