The computer shouldn't say "You are wrong". It should say, "You are incorrect".
The computer doesn't say anything. The question setter says "You are wrong"
In my case, I didn't think carefully enough about the reasons:tempdb
can't have snapshots because it's rarely explicitly referenced and a read-only temporary area is pointless.model
is a template, so should be treated as read-only anyway (plus it's never referred to explicitly either).master
contains the description of the structure of all other databases (amongst other things), so a snapshot wouldn't work because it may not describe the structure correctly and hence would be unusable.
The other 3 are really just ordinary databases. Although msdb
contains a lot of MS specific stuff such a scheduling info, it's really just an ordinary database.
I missed out on master (... Waiting for someone more knowledgeable to correct me ... )