What do the permissions -rwSr-xr-x mean for a binary file when it is executed as a command?

Which of the following commands shows the definition of a given shell command?

Which of the following commands can be used to display the inode number of a given file?

Which of the following commands set the sticky bit for the directory /tmp? (Choose TWO correct answers.)

What does the command mount -a do?

After running the command umount /mnt, the following error message is displayed:
umount: /mnt: device is busy.
What is a common reason for this message?

Instead of supplying an explicit device in /etc/fstab for mounting, what other options may be used to identify the
intended partition? (Choose TWO correct answers.)

SIMULATION
Which umask value will result in the default access permissions of 600 (rw——-) for files and 700 (rwx——) for
directories? (Specify only the numerical umask value.)

What is the purpose of the Filesystem Hierarchy Standard?

Which of the following Linux filesystems preallocates a fixed number of inodes at the filesystem’s make/
creation time and does NOT generate them as needed? (Choose TWO correct answers.)