Re: Paging file

From: James Rich <james@eaerich.com>
> If an object only has
> one address, can there be more than one copy of that object?  Can an
> object exist both on disk and in memory?

yes and if you change the in-memory one, that may or may not
be reflected on the disk until much later, if ever. A classical case
is a save file. You can change a save file in memory, but if you
try to restore from it, the restore process reads from the disk
(always device driven - used to be diskette or tape) and not
from the object you have just changed in memory. Some temporary
objects never make it to the disk.