Linux MCQs – File Access Rights and Permissions – Part 2
Multiple choice questions and answers (MCQs) on Linux focuses on “Managing of users accounts and groups” to prepare for exams, interviews, and certifications, such as Redhat exam, CompTIA exam, Ubuntu / SuSE certification, LPI certification exam. These MCQs will easily prepare anyone to pass their Linux test.
1. Which command is used to assign read-write permission to the file owner?
A chmod a+r myfile
B chmod o+r myfile
C chmod u=rw myfile
D chmod og-r myfile
2. The following command:
$ chmod 4777 c.out
A will set the SUID bit of c.out file
B will only set the SUID bit of c.out file if the command is submitted by the root user
C invalid command
D will put the sticky bit of c.out file
4. The -rwxr-xr-t permissions represented by the following octal value.
A 0777
B 1755
C 1754
D 2754
String notation:
$ chmod o+t file1.txt
Numeric notation:
$ chmod 1755 file1.txt
The sticky bit has no effect if other does not have execution permissions. The sticky bit is represented with a lowercase “t” in the output of ls. In cases where it has no effect, it is represented by a capital “T”.
$ ls -l file1 -rwxr-xr-t 1 user1 user1 0 2018-10-29 21:41 file1
5. The following command :
$ chmod o-w myfile
A defines the write permission for “others”.
B defines the write permission for “owner”.
C deletes the write permission for “others”.
D deletes write permissions
6. Which of these commands will set the permissions on the file “myfile”: read and write for the owner(user), read for the group and nothing for others?
A $ chmod 046 myfile
B $ chmod 640 myfile
C $ chmod 310 myfile
D $ chmod rw rw myfile
- r = permission to read
- w = permission to write
- x = permission to run
- – = 0 permission
With r=4 / w=2 / x=1
$ chmod 640 myfile
$ ls -l myfile -rw-r----- 1 user1 user1 0 2018-10-29 21:41 myfile
7. If you are a root user, how can you enable execution only for the owner of the file “myfile”?
A $ chmod +x myfile
B $ chmod u+x myfile
C $ chmod a+x myfile
D $ chmod U+X myfile
8. What does the following command “chmod + t”?
A wrong syntax
B defines the EUID
C defines the EGID
D set up the sticky bit
9. A user executes the following command :
$ chmod + x myfile.txt
Which of the following statements is true for the output of this command?
A The command results in an execution permission being added to the user who executed this command
B The command results in the execution permission being added for the owner of the file
C The command causes an error because the file is not an executable file
D The command results in the execution permission being added for all (user, group and others)
10. Which of the umask command parameters grant the right to run the newly created regular files by default?
A 222
B 111
C 000
D None of the above
umask by default is 022 so
- permissions for newly created directories: rwxr-xr-x.
- permissions for newly created files: -rw-r-r–.
By default, the execution permission is disabled for regular files.
- Linux MCQs – LINUX commands – Part 1
- Linux MCQs – LINUX commands – Part 2
- Linux MCQs – LINUX commands – Part 3
- Linux MCQs – LINUX commands – Part 4
- Linux MCQs – File systems
- Linux MCQs – File Management – Part 1
- Linux MCQs – File Management – Part 2
- Linux MCQs – Different File Types
- Linux MCQs – File Access Rights and Permissions – Part 1
- Linux MCQs – File Access Rights and Permissions – Part 2
- Linux MCQs – Init and Shutdown Process
- Linux MCQs – Managing of users accounts and groups
- Linux MCQs – Multiple Choice Questions and Answers – Process management
- Linux MCQs – Linux environment – Part 1
- Linux MCQs – Linux environment – Part 2
- Linux MCQs – Linux environment – Part 3
