Meaning of 000 mode bits for root user?

Question

What is the meaning of 000 mode bits incase root user sets 000 for his own file?

I logged in as root user and removed all permissions from a file, still i can see the content of file.

#chmod 000 test
#ls -l
---------- 1 root root   216 Dec 10 13:13 test
#cat test
......
....
File content displayed
....

Answer 1

Basically, rootness trumps permissions.

Permissions 000 means only root can read or write the file.

I'm not aware of any extra special use for the combination of root ownership and 000 permissions.