Section 12.3
Review Questions
The working set

---

1. Define working set.

answer...
the set of pages that a program is currently accessing (or has been accessing over the last small amount of time)

2. If there is not enough real memory and the program just wastes all its time shuffling pages between real memory and the disk, what do we say the program is doing?

answer...
thrashing

3. How much longer is a disk access than a main memory acces? Round it off to the nearest order of magnitude.

answer...
about 5 orders of magnitude

4. Can a user program sabotage virtual memory, and if so, how?

answer...
yes, by deliberating reading random words from its memory space

5. What is the name of the place on disk where pages are kept that are not currently active in memory?

answer...
swap area