 Homework 11General Comments Problem from the book are taken from the Chapter Review Problems sections.
 For full credit, provide context for each problem,
show all calculations, and explain your work/answers.

Numbers and/or algebra by themselves are not enough.

You will lose a significant amount of credit if you do not show enough work/context for your answers.

Homework assignments must be very neatly written or typeset (e.g. using Word or OpenOffice).
DetailsDo the following exercises from pages 144145 of your textbook (134135 in the full book) and the ones listed below.
Problem  Points  Comments


33  4  Answer both parts.
 41  4  Answer both parts.
 42  4  Make sure you understand the exact definitions of the two terms. Also, try to exhaust all possible causes of each.
 43  4
 47  4  Give your answer using reasonable units (e.g. days or years if it is really large).
 Problem 1 below  4
 Problem 2 below  4


A computer system has a cache with access rate of 1 ns (1 x 10^{9} seconds),
and RAM with access rate of 50 ns (50 x 10^{9} seconds).
Assume that a requested item is in the cache 95% of the time.
What is the average access time for an item on this system?

A computer system has a cache with access rate of 1 ns (1 x 10^{9} seconds),
RAM with access rate of 50 ns (50 x 10^{9} seconds), and virtual memory on the
hard drive with access rate of 9 ms (9 x 10^{3} seconds).
Assume that a requested item is in the cache 95% of the time, and is in the
RAM 99% of the time. What is the average access time for an item on this system?
