[NTLUG:Discuss] Swap versus paging

[Leroy Tennison]

I was in an interview for a Linux position and was asked if I knew the 
difference between paging and swap (I didn't and told them so).  The 
reply stated that paging was better.  With Google about all I could find 
(first 50 hits) was that there was a difference in scope between 
swapping and paging.  Swapping placed whole processes on disk whereas 
paging always worked in 4K amounts.  Questions:

What's the significance of the question?  Is this something that every 
Linux-literate person should know?

If it is significant, what are the main things to know?  can someone 
point me to a reasonably brief discussion?

Thanks for your help.