What group of permissions can't be set for the file in Unix system?

For whom permissions to access the file can't be set in Unix system?

Which of the following shell commands specifies the access permissions of the process to run as if it had been started by its group?

What permissions will be set by the command "chmod go-w file"?

What permissions will be set by the command "chmod g=u-w file"?

What permissions will be set by the command "chmod go= file"?

Which option in file /etc/exports allows remote clients to mount any directory in the file system directly?

What does the file name foo[127] mean in Unix?

What does the file name *.* mean in Unix?

What is false about UNIX file extensions?

What is false about the Network File System?