Question

You have a critical file called yearend.xls. you want to set file permissions so that only the owner of the file can modify it and only group owners can read it. which permission listed below will accomplish that

Answer 1

The owner has by default all permissions i.e R/W/E/M etc. so nothing needs to be done. Second, create a group and add the members to the group and assign Read-Only permissions to the file.