Linux File System & Permissions (Linux+) chmod Quiz

1. True or False: chmod 644 file gives write permission to group and others.

True

False

Submit

4. True or False: Only the file owner or root can change a file's permissions.

True

False

5. What does chmod -x file do in symbolic notation?

Removes execute from owner, group, and other

Adds execute to all

Removes all permissions

Sets permissions to 755

6. Which permission combination (rwx) equals octal 7?

4 + 2 + 1

4 + 3

5 + 2

All of the above

7. True or False: The setgid bit on a directory forces new files to inherit the directory's group.

True

False

8. In chmod u=rwx,g=rx,o= file, what permissions does 'other' have?

Read and execute

Read only

No permissions

Execute only

9. What command would you use to view detailed file permissions?

Ls -l

Stat file

File -p

Both a and b

10. Which octal digit position represents 'other' permissions (4, 2, 1)?

First digit

Second digit

Third digit

Fourth digit

11. What does the octal value 755 represent in chmod notation?

Rwxr-xr-x

Rwxrwxrwx

R--r--r--

Rwxrw-r--

12. In symbolic notation, what does 'a' represent?

All users (owner, group, other)

Assign permissions

Access control list

Administrator only

13. What does the sticky bit (1000 in octal) prevent in a directory?

Reading files by non-owners

Non-owners from deleting other users' files

Writing to the directory

Executing files in the directory

14. Which command changes both owner and group of a file?

Chown owner:group file

Chgrp owner:group file

Chmod owner:group file

Chattr owner:group file

15. The octal notation 4755 includes which special permission?

Sticky bit

Setgid

Setuid

No special permission

16. What does the setuid bit do when set on an executable file?

Allows group members to execute with group privileges

Allows users to execute with owner privileges

Prevents execution by non-owners

Enables file deletion by anyone

17. Which symbolic chmod command adds execute permission for the owner?

Chmod u+x file

Chmod o+x file

Chmod g+x file

Chmod a+x file

18. What is the numeric equivalent of r-x?

5

6

4

7

19. In the permission string rwxr-xr-x, what do the first three characters represent?

Group permissions

Owner permissions

Other permissions

Special bits

20. Which command recursively changes permissions on a directory and all its contents?

Chmod -r 755 /path

Chmod -R 755 /path

Chmod --recursive 755 /path

Both b and c

Linux Permissions Quiz: Can You Master chmod?

1. True or False: chmod 644 file gives write permission to group and others.

2.

What first name or nickname would you like us to use?

2. The chmod command u+rwx,g+rx,o= sets permissions using ____ notation.

3. The permission string -rw-r--r-- is equivalent to octal ____.

4. True or False: Only the file owner or root can change a file's permissions.

5. What does chmod -x file do in symbolic notation?

6. Which permission combination (rwx) equals octal 7?

7. True or False: The setgid bit on a directory forces new files to inherit the directory's group.

8. In chmod u=rwx,g=rx,o= file, what permissions does 'other' have?

9. What command would you use to view detailed file permissions?

10. Which octal digit position represents 'other' permissions (4, 2, 1)?

11. What does the octal value 755 represent in chmod notation?

12. In symbolic notation, what does 'a' represent?

13. What does the sticky bit (1000 in octal) prevent in a directory?

14. Which command changes both owner and group of a file?

15. The octal notation 4755 includes which special permission?

16. What does the setuid bit do when set on an executable file?

17. Which symbolic chmod command adds execute permission for the owner?

18. What is the numeric equivalent of r-x?

19. In the permission string rwxr-xr-x, what do the first three characters represent?

20. Which command recursively changes permissions on a directory and all its contents?