Assume a fully associative cache with $16$ one$-$word blocks that is initially empty. Consider the series of address references given below as word addresses $($NOT byte addresses$).$ What would be the cache hit ratio rounded to the nearest percent?

$1,4,8,5,20,17,19,56,9,11,4,43,5,6,9,17$

a$.19\%$

b$.25\%$

c$.38\%$

d$.100\%$

$q,$

QUESTION $20$

Assume a direct mapped cache with $16$ one$-$word blocks that is initially empty. Consider the series of address references given below as word addresses $($NOT byte addresses$).$ What would be the cache hit ratio rounded to the nearest percent?

$1,4,8,5,20,17,19,56,9,11,4,43,5,6,9,17$

$19\%$

$25\%$

$38\%$

$100\%$

$q,$

$q,$

QUESTION $21$

Assume a direct mapped cache with four$-$word blocks and a total size of $16$ words that is initially empty. Consider the series of address references given below as word addresses $($NOT byte addresses$).$ What would be the cache hit ratio rounded to the nearest percent?

$1,4,8,5,20,17,19,56,9,11,4,43,5,6,9,17$

a$.19\%$

b$.25\%$

c$.38\%$

d$.100\%$