Same inode numbers for diff files

Hi Guys,

Hope all are doing well.

1:Any one can explain the scenario of SAME INODE NUMBERS FOR DIFF FILES in linux

2:I have a file called ravi.txt and there is no permissions for owner,group and others.we can delete ravi.txt


Please share your valuable answers.

if you hard link two files, both files have same inode number
touch f1
ln f1 f2
f1 and f2 have same inode number
two files in different file system may have same inode number

yes, owner of file can manipulate his/her file