score:2
It's mainly group visas issued in Beijing that are loose-leaf documents, while visas from North Korean embassies are pasted in the person's passport.
If the visa's in your passport, the entry and exit stamps will be as well.
Upvote:1
It seems to depend. Some people have had an experience where you get it on a separate piece of paper, that you keep with your passport.
Others have it glued into their passport and would not be able to remove it without damaging their passport itself. For example, an answer from quora shows it glued into a Dutch passport after his visit.