Question

Which of the following symbol is used to indicate the absence of a permission of a file?

(a) $

(b) &

(c) +

(d) –

The question was asked during an interview.

I want to ask this question from File Ownership and Permissions in division Basic File Attributes of Unix

Answer 1

Correct choice is (d) –

Explanation: ( – ) is used to indicate the absence of a single or set of permissions of a file. For example, if a file has all the three permissions for owner but is only readable by group members and others, then the set of permissions would be,