A pointer indicates which page is to be replaced next. When a frame is needed,
the pointer advances until it finds a page with a 0 reference bit. As it advances,
it clears the reference bits . Once a victim page is found, the page
is replaced, and the new page is inserted in the circular queue in that position

9.13
a
1. 0
2. when a new page associated with a frame
3. a page associated with a frame isn't demanded
4. fifo page replacement
b 13
c 11