A4-way set associative cache has 64 blocks of 16 words. how many bits are there in the ""tag"" field of the 15-bit address for this architecture

3 bits

Explanation:

Given a 4- way set associative cache that has 64 blocks of 16 words.

Therefore, the number of sets cache has:

Now,

Cache data size is 16kB

The number of cache blocks can be calculated as:

Now,

Total sets =

Total sets =

Now,

n = 6

For 15 bit address for the architecture, the bits in tag field is given by:

15 - (6 + 6) = 3 bits

Thus the tag field will have 3 bits

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