Sample exam 3 problems:

1. For which of the following protection problems is(are)
 the use of
UNIX rwx protection bits appropriate.  Justify your answer.

(a) Linda and Mary want to share some secret files.

(b) Henry wants his files readable by everyone except Jennifer.

(c) Lucy wants some of her files to be public.

2. List four types of directory structures.

3. List 5 security problems.