Introduction to Linux I – Chapter 04 Exam Answers 2019 + PDF file

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  1. If you want to delete a variable, you can run:
    • wipe
    • clear
    • delete
    • unset
  2. To view all current variables, you can use:
    • dump
    • var
    • view
    • set
  3. To process a script file in the current context, you execute: (choose two)
    • .
    • include
    • source
    • exec
  4. Environment variables can be viewed by running: (choose two)
    • export -e
    • vars
    • export -p
    • env
  5. 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. Which of the following will create a variable?
    • VAR+value
    • VAR=value
    • VAR value
    • Var~value
  7. Which character(s) cannot be placed in variable names?
    • Upper-case alpha characters
    • Hyphen (“-“) character
    • Underscore (“_”) character
    • Lower-case alpha characters
    • Numeric characters
  8. Shell variables are used to:
    • Reboot the system
    • Prevent users from logging in
    • Hide passwords
    • Hold critical system information
  9. 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. 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. Environment variables cannot be declared by which command?
    • typeset
    • declare
    • export
    • set
  12. 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. 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 /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. 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. The path testdir/file.txt is:
    • An invalid path
    • A relative path
    • A circular path
    • An absolute path
  17. The path /data/file.txt is:
    • A circular path
    • An absolute path
    • A relative path
    • An invalid path
  18. 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. 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. Which of the following files is specific to each user and executed only during login?
    • ~/.bash_profile
    • /etc/profile
    • /etc/bashrc
    • ~/.bashrc
  21. 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. Which of the following files is for all bash shell users and executed only at login?
    • ~/.bash_profile
    • ~/.bashrc
    • /etc/bashrc
    • /etc/profile
  23. Which of the following commands will execute the last command that started with ec:
    • !!
    • !!ec
    • !ec
    • !-ec
  24. An absolute path always starts with which character?
    • .
    • /
    • ~
  25. In the PATH variable, the __ character is used to separate the directories.
    • :
    • ;
    • ~
    • /
  26. The _____ command will allow you to see commands that you have previously executed.
    • hist
    • previous
    • history
    • last
  27. The _____ variable stores directories that the shell used to find executable files.
    • CD
    • DIR
    • PATHS
    • PATH
  28. When specifying a path, the __ character symbolizes the current directory.
    • ..
    • /
    • ~
    • .
  29. 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. 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

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