Ch3 Configuring the Shell Exam

Ch3 Configuring the Shell Exam

1. An absolute path always starts with which character?

   • /
   • ~
   • \
   • .

2. Environment variables are:

   • Only available to the shell they are created in
   • Passed into other shells and commands
   • Not used by shells at all
   • Are not a valid type of variable

3. Environment variables can be viewed by running:

   (choose two)

   • vars
   • env
   • export -p
   • export -e

4. Environment variables cannot be created by which command?

   • declare
   • set
   • export
   • typeset

5. If you want to delete a variable, you can run:

   • unset
   • clear
   • wipe
   • delete

6. In the PATH variable, the __ character is used to separate the directories.

   • ~
   • ;
   • /
   • :

7. Local variables are:

   • Only available to the shell they are created in
   • Are not a valid type of variable
   • Not used by shells at all
   • Passed into other shells and commands

8. Shell variables are used to:

   • Reboot the system
   • Hold critical system information
   • Prevent users from logging in
   • Hide passwords

9. The PATH environment variable is used for:

   • Specifying locations that are writable for the user
   • Specifying directories to search for executable files
   • Specifying directories to contain documentation
   • Specifying locations where ordinary users can navigate

10. The path /data/file.txt is:

    • An invalid path
    • A circular path
    • A relative path
    • An absolute path

11. The PATH variable can be used under which situation?

    • The command is not found.
    • A full path name to a command is provided.
    • The command is a function.
    • The command is an alias.

12. The path testdir/file.txt is:

    • A relative path
    • An absolute path
    • An invalid path
    • A circular path

13. The /bin directory contains:

    • Nothing; it is not a valid directory
    • The most fundamental commands that are essential for the operating system to function
    • Commands that have been compiled from local sources
    • Essential administrative commands

14. The _____ variable stores directories that the shell used to find executable files.

    • PATHS
    • PATH
    • DIR
    • CD

15. The /sbin directory contains:

    • Essential administrative commands
    • Commands that have been compiled from local sources
    • The most fundamental commands that are essential
    • Nothing; it is not a valid directory

16. The /usr/local/bin directory contains:

    • Nothing; it is not a valid directory
    • Commands that have been compiled from local sources
    • The most fundamental commands that are essential for the operating system to function
    • Essential administrative commands

17. To process a script file in the current context, you execute:

    (choose two)

    • source
    • .
    • include
    • exec

18. To view all current variables, you can use:

    • var
    • set
    • dump
    • view

19. When specifying a path, the __ character symbolizes the current directory.

    • ~
    • ..
    • .
    • /

20. Which character(s) cannot be placed in variable names?

    • Underscore _ character
    • Lower-case alpha characters
    • Upper-case alpha characters
    • Hyphen – character

21. Which file can you place in your home directory to be executed when you log off the system?

    • ~/.bash_logout
    • ~/.bashrc
    • ~/.bash_profile
    • /etc/bashrc

22. Which of the following commands will execute the last command that started with ec:

    • !!ec
    • !!
    • !-ec
    • !ec

23. Which of the following files is for all bash shell users and executed every time a bash shell is opened?

    • ~/.bash_profile
    • ~/.bashrc
    • /etc/profile
    • /etc/bashrc

24. Which of the following files is for all bash shell users and executed only at login?

    • ~/.bashrc
    • ~/.bash_profile
    • /etc/profile
    • /etc/bashrc

25. Which of the following files is specific to each user and executed every time a bash shell is opened?

    • ~/.bash_profile
    • /etc/bashrc
    • ~/.bashrc
    • /etc/profile

26. Which of the following files is specific to each user and executed only during login?

    • ~/.bashrc
    • ~/.bash_profile
    • /etc/bashrc
    • /etc/profile

27. Which of the following is a valid way to add the /data directory to the existing PATH variable?

    • PATH=/data
    • PATH=$PATH:/data
    • $PATH=/data
    • $PATH=$PATH:/data

28. Which of the following will create a variable?

    • variable+value
    • variable=value
    • variable value
    • variable~value