In two$-$level memory, the hit ratio $H$ is defined as the fraction of all memory accesses that are found in the faster memory.

True

False

A memory unit made up of $16$ k words. How many address lines are needed in this case?

$4$

$10$

$13$

$14$

Given a $2\mathrm{.}5$ GHz processor, what is the required time to execute instructions that need $10$ billion cycles

$2\mathrm{.}5$ seconds

$4$ seconds

$5$ seconds

$10$ seconds