self doubt

Question

Main memory=512 words.

block size=8 words.

cache size =32 words

what is tag,line no.,block offset bits

Answer 1

Main memory has 512 words, that means it requires 9 bits to identify each word. The physical address length is 9 bits.

Assuming the cache is a Direct Mapped Cache,

Block is of size 8 words, so you need 3 bits for block offset.

Cache contains 32 words and block size is given as 8 words, that means cache contains 4 blocks. To identify one line/block you need 2 bits.

The remaining bits go for tag, i.e 4 bits.