User brian changes the permissions for db_data this command: chmod 4755 db_dataWhat is true?

Use the chmod command to change permissions for a file or directory. You must be the owner of a file or directory, or have root access, to change its permissions.

Here we do not know if brian owns db_data.

Note:

Permission

7 full

6 read and write

5 read and execute

4 read only

3 write and execute

2 write only

1 execute only

0 none

0 --- no permission

1 --x execute

2 -w- write

3 -wx write and execute

4 r-- read

5 r-x read and execute

6 rw- read and write

7 rwx read, write and execut

Solaris: Solaris Advanced User's Guide