Quiz submission record for quiz7-1-1 at Sun Aug  1 21:34:31 2004:

Your Answer for Question 1:
Virtual address add a layer of addressing over the physical addresses and the disk addresses.  Virtual addresses map to both physical addresses and disk addresses but each virtual address only has one mapping.  By using virtual addresses, you have a continuum of addresses that include the physical addresses and the disk addresses even though RAM and disk are separate entities.

The whole point of mapping virtual address to physical and disk addresses is that it makes the amount of memory you can access look bigger.

You can get a PA from a VA.  It's just a mapping.

Your Answer for Question 2:
Fixed sized blocks means the OS doesn't need to find a contiguous block of memory; it just needs to find a sufficient number of pages in main memory.

Having large chunks means access time is faster.

Having small chunks means that you don't have large chunks with unused memory in it.


Your unique submission ID is quiz7-1-1-cs61c-ej-1091421271-3221.