Introduction to Linux I Chapter 4 Exam

Last Updated on May 20, 2021 by Admin

Introduction to Linux I Chapter 4 Exam Answer

1. Question ID 396

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

   • wipe
   • clear
   • delete
   • unset

2. Question ID 397

   To view all current variables, you can use:

   • dump
   • var
   • view
   • set

 

3. Question ID 398

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

   (choose two)

   • .
   • include
   • source
   • exec

4. Question ID 399

   Environment variables can be viewed by running:

   (choose two)

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

 

5. Question ID 400

   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

6. Question ID 401

   Which of the following will create a variable?

   • VAR+value
   • VAR=value
   • VAR value
   • Var~value

7. Question ID 402

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

   • Upper-case alpha characters
   • Hyphen (“-“) character
   • Underscore (“_”) character
   • Lower-case alpha characters
   • Numeric characters

 

8. Question ID 403

   Shell variables are used to:

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

9. Question ID 404

   Local variables are:

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

10. Question ID 405

    Environment variables are:

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

11. Question ID 406

    Environment variables cannot be declared by which command?

    • typeset
    • declare
    • export
    • set

12. Question ID 408

    The PATH variable will be used under which situation?

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

 

13. Question ID 409

    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. Question ID 410

    The /sbin directory contains:

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

15. Question ID 411

    The /usr/local/bin directory contains:

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

16. Question ID 413

    The path testdir/file.txt is:

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

 

17. Question ID 414

    The path /data/file.txt is:

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

18. Question ID 417

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

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

19. Question ID 419

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

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

20. Question ID 420

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

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

21. Question ID 421

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

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

22. Question ID 422

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

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

23. Question ID 425

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

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

24. Question ID 879

    An absolute path always starts with which character?

    • .
    • /
    • ~

25. Question ID 880

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

    • :
    • ;
    • ~
    • /

26. Question ID 881

    The _____ command will allow you to see commands that you have previously executed.

    • hist
    • previous
    • history
    • last

27. Question ID 882

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

    • CD
    • DIR
    • PATHS
    • PATH

28. Question ID 883

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

    • ..
    • /
    • ~
    • .

29. Question ID 884

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

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

30. Question ID 885

    The _____ command will tell you if a command exists as a built-in command, function, alias or a command located within the PATH variable.

    • set
    • export
    • declare
    • type