Question

The permission -rwSr-r- represented in octal expression will be ________.

1) 777
2) 2666
3) 4744

Answer 1

The permission string -rwSr-r- translates to 644 in octal, as the user has read, write and set UID permissions, and group and others have only read permissions.

Step-by-step explanation:

The permission -rwSr-r- represented in octal expression is not 777, 2666, or 4744. Instead, this permission string translates to an octal representation based on Unix permission bits. The first character indicates it's a file (not part of the octal notation), the following sets of 'r', 'w', and 'S' indicate read, write, and set UID permissions respectively.

Breaking down the permissions:

• User: read (r), write (w), set UID (S) = 4 (read) + 2 (write) + 4 (set UID) = 6
• Group: read (r) = 4
• Others: read (r) = 4

Therefore, the correct octal representation is 644. It seems there might have been an error with the provided options or with the original permission string.