Consider the following statements about UNIX file permissions:
(A) UNIX provides three permission types — Read, Write and Execute.
(B) UNIX provides three permission sets — Owner, Group and Others.
Which of the above statement(s) is/are true?

Explanation

UNIX file permissions are organised along two independent dimensions: the type of access — read, write, execute (statement A) — and the class of user it applies to — owner, group, others (statement B). Together these give the familiar 9-bit rwxrwxrwx permission string shown by commands like `ls -l`, with three permission bits for each of the three user classes. Both statements correctly describe this scheme, so the answer is both (A) and (B), option (iii).