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Cache is physically tagged so used physical addresses only until specified for a virtually indexed cache. 

So, physical address is 14 bits.


Lets consider the cache configuration:

3 bits - Addressing within the block

2 bits - addressing the set (as we can have 4 sets in total)

So, 9 bits - tag bits

Now, we have total 8 blocks in cche. For each block, we require 9 tag bits.

Hence, tag memory = 9*8 = 72 bits



REF: https://www.youtube.com/watch?v=3sX5obQCHNA

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