Introduction to Linux II – Chapter 01 Exam Answers 100% PDF file

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  1. Which of the following is a valid variable assignment?
    • 2=xyz
    • APP_VAR=’zero’
    • alpha-init=5
    • MY VAR= “set to one”
  2. Shell variables are case insensitive.
    True or False?

    • True
    • False
  3. Which of the following is NOT a valid variable name?
    • _LPIC
    • VAR_1
    • NEWVARIABLE
    • 2_VAR
  4. A new environment variable can be “exported” and assigned a value with a single command.True or False?
    • True
    • False
  5. Which of the following is NOT a valid command for variable declaration?
    • typeset –x ENV_VAR=1
    • export ENV_VAR=1
    • newvar –x ENV_VAR=1
    • declare –x ENV_VAR=1
  6. The ___________ command is used to display the value of a specific variable.
    • value
    • var
    • echo
    • set
  7. Which command can be used to display both local and environment variables?
    • export –p
    • declare –x
    • set
    • env
  8. A variable once declared cannot be deleted.True or False?
    • True
    • False
  9. Which command can be used to delete a variable?
    • rmvar
    • set -r
    • unset
    • declare
  10. PATH variable directories are searched __________ when executing a command.
    • Left to right
    • Right to left
    • In no particular order
    • Including only the first 256 characters
  11. Which of the following is NOT a valid option for executing a command that is not in the directories listed in the PATH variable?
    • By typing the absolute or relative path to the command
    • Rename the command and its directory
    • Add the directory containing the command to the PATH variable
    • Copy the command to a directory listed in the PATH
  12. The command PATH=$PATH:/home/John does the following:
    • Creates a new PATH variable with only the /home/John directory as the value
    • Does nothing, because anything after the : is discarded
    • Appends the directory /home/John to the existing PATH variable
    • Replaces the existing directories in the PATH with the /home/John directory
  13. Consider the following value of PATH variable: /bin:/usr/local/sbin:/home/joe/bin:/home/joe/test Joe modifies the my_scr.sh script, which is stored in the directory /home/joe/bin then places a copy of my_scr.sh in /home/joe/test. Executing my_scr.sh will:
    • Run the original version of the script in the /home/joe/bin directory
    • Check the timestamp and run the latest version of my_scr.sh
    • Not run at all, reports error
    • Run the new version of the script placed in /home/joe/test
  14. The ___________ command can be used to check if the command already exists.
    • type
    • ex
    • check
    • command
  15. Which of the following switches will include the full path in the prompt?
    • \W
    • \e
    • \H
    • \w
  16. Defining the PS1 variable in an initialization file will make changes to the prompt persistent between logins.
    True or False?

    • True
    • False
  17. If the command HISTIGNORE=’ls*’ is placed in the ~/.bash_profile file, which of the following commands would not be placed in the history list?
    • history
    • ls –la
    • cd
    • cat
  18. Which of the following is NOT a purpose for creating an alias?
    • To create a short nickname for a long command or series of commands
    • To create “DOS-like” commands
    • To make them run faster
    • To include a command option by default
  19. The command to remove an existing alias from the current shell is:
    • alias –d
    • unalias
    • unset alias
    • rmalias
  20. The best way to group multiple commands and pass arguments is to:
    • Create an alias
    • Concatenate them
    • Use functions
    • Create an initialization file
  21. A function accepts 3 arguments as input. The third argument of a function is identified as:
    • $arg3
    • $PATH
    • $3
    • $1
  22. Changes in the __________ initialization file will affect all the users on the system.
    • Global
    • Local
    • Network
    • Shell
  23. Local initialization files, by default, are stored in which directory?
    • /etc
    • User’s home directory
    • /usr
    • /bin
  24. A Login BASH shell executes which of the following additional files (compared to an interactive BASH shell)?
    • /etc/profile and /etc/bashrc
    • /etc/profile and ~/.bashrc
    • /etc/profile and either ~/.bash_profile or ~/.bash_login or ~/.profile
    • ~/.bash_profile and ~/.bashrc
  25. Administrators use the __________ file to create key environment variables and set key system values for every user.
    • /etc/bashrc
    • /etc/profile
    • /etc/config
    • .profile
  26. Sourcing is an effective way to test initialization file changes. Which of the following is used to source a file?
    • touch command
    • ~ character
    • Either . character or the source command
    • None of the above
  27. Which script is executed when you exit the shell?
    • /etc/bashrc
    • ~/.bash_profile
    • ~/.bashrc
    • ~/.bash_logout
  28. Typical BASH exit scripts are found in ~/.bash_logout and __________ files.
    • /etc/bash_logout
    • ~/.bash_profile
    • /etc/bashrc
    • /etc/profile
  29. Most of the Linux commands used by regular users can be found in which directory?
    • ~/bin
    • /usr/bin
    • /usr/local/sbin
    • /sbin

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