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Linux File Permissions Important Questions
By: Prof. Dr. Fazal Rehman | Last updated: May 2, 2025

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1. : 764 File Permission means?
A) Everyone can read, write, and execute.
B) Everyone can read, group can execute only, and the owner can read and write.
C) Everyone can read, write, and execute.
D) Everyone can read, group including owner can write, owner can execute.

2. : Representation of permission of rwxr-r in octal expression is?
A) 711
B) 777
C) 666
D) 744

3. : How effective user id can be set?
A) 1711
B) 0886
C) 2666
D) 4744

4. : Through which permission sticky bit can be set?
A) 4744
B) 1711
C) 2666
D) 0777

5. : Representation of the permission of rwsr-r in octal expression is?
A) 2666
B) 4744
C) 4644
D) 0777

6. : Representation of the permission of rwxr-sr in octal expression is?
A) 2754
B) 0777
C) 2766
D) 2744

7. : What will happen if a user removes (rm) a readonly file (444 permission)?
A) Because of insufficient permissions, rm command fails.
B) The file is removed successfully (and silently).
C) Rm command points out the confirmation that the command is successful upon confirmation.
D) Rm command points out the confirmation, however, the operation fails because of insufficient permissions.

8. : For applying a chmod operation on a file, what will happen?
A) The file last change time is updated.
B) The file’s last accessed time is updated.
C) File last modification time is updated.
D) None of the mentioned.

9. : Permission of new directory according to umask 0002 is?
A) 664
B) 777
C) 775
D) 774

10. : In the directory of /home/user1/direct, the command for all the files and subdirectories to execute the permission is?
A) chmod –F +x /home/user1/direct
B) chmod –A +x /home/user1/direct
C) chmod –R +x /home/user1/direct
D) chmod –r +x /home/user1/direct

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