Final answer:
The umask setting 111 allows execute permission to be set by default on regular files.
The answer is option ⇒2) 111
Step-by-step explanation:
The umask settings are used to determine the default permissions for newly created files and directories. The umask value is subtracted from the default permissions to determine the final permissions.
In this case, umask setting 111 will allow execute permission to be set by default on regular files. The octal value 111 in binary representation is 001 001 001. The value in the leftmost digit represents the permission for the owner, the value in the middle digit represents the permission for the group, and the value in the rightmost digit represents the permission for others. Since the execute permission is set for all three categories, this umask setting will allow execute permission to be set by default on regular files.
The answer is option ⇒2) 111