Introduction to Linux II – Chapter 02 Exam Answers 100% PDF file

Introduction to Linux II – Chapter 02 Exam Answers 100% PDF file
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  1. Which of the following steps is NOT performed while creating a shell script?
    • Create a file with commands
    • Make the file executable
    • Login as root on the server console
    • Put #!/bin/bash as the first line
  2. The first line in a shell script reads:#!/bin/bashWhat does it signify?
    • It is a comment
    • The executable (shell) to use to run the script
    • Name of the editor used to create the file
    • The script requires root login
  3. The command bash script_file can be used to directly execute a shell script.
    True or False?

    • True
    • False
  4. Which of the following is placed before a script name to execute it from the current directory?
    • #!
    • !!
    • ./
    • //
  5. Instead of specifying the current directory, it is better to place the script in a location that is included in the __________ variable.
    • SCRIPTS
    • ENV
    • GLOBAL
    • PATH
  6. An ideal place for a regular user (not a super user), to place their shell scripts would be:
    • /sbin
    • /home/john/bin
    • /usr/local/sbin
    • /bin
  7. Use of SETUID permission on scripts is the best way to specify permissions.True or False?
    • True
    • False
  8. A user has written a few scripts for private use. Which of the following commands should be used so that no one else has execute permission?
    • chmod u-rx script_file
    • chmod u+x script_file
    • chmod -R 755 script_file
    • chmod a+x script_file
  9. Which of the following commands will produce the same result as start=`date`?
    • start=date
    • start=%date%
    • start=$(date)
    • start=(date)
  10. The __________ statement can be used to gather information from the user running the script.
    • read
    • for
    • seq
    • if
  11. The command read –p will capture the current position of the mouse pointer.
    True or False?

    • True
    • False
  12. Conditional statements CANNOT be used to determine which of the following?
    • System runlevel
    • If the file exists
    • If two strings match or not
    • If two numeric values match
  13. When will the condition test –n STRING be true?
    • If the length of STRING is nonzero
    • If the length of STRING is zero
    • Never
    • Always
  14. In shell scripts, the conditional statement if must always end with:
    • then
    • elif
    • fi
    • False condition
  15. The return status from a command is 1. What does this indicate?
    • Calculation done by the command yields the result 1
    • Command is still running in the background
    • Command executed successfully
    • Command did not execute successfully
  16. A user jamie already exists in the system. The command grep jamie /etc/passwd displays one user record. Running the echo $? command immediately after the grep command would result in what output?
    • 5
    • 1
    • 2
    • 0
  17. Which of the following will NOT handle bad user input properly:
    • Checking the value of the $? variable using an if statement
    • Checking the validity of user input before passing it on to the command
    • Checking the return value of a command directly in the conditional part of the if statement
    • Checking the command’s Standard Output
  18. A user wants an email sent when his shell script is executed successfully. Which of the following commands in the script can do this?
    • mail root
    • echo $mail
    • mail brad
    • cron job will send an email by default
  19. The __________ statement is most useful in performing an operation on multiple items.
    • read
    • for *
    • test
    • many
  20. What will the following statement do?for name in `cat /root/users`
    • Get into an infinite loop
    • Assign to the name variable each value in the specified file
    • Run for two values cat and /root/users
    • Report an error
  21. The output of the command seq 10 10 30 will be:
    • 50
    • 10 10 30
    • 10 20 30
    • 3
  22. The ___________ command is used to print a sequence of numbers.
    • seq
    • series
    • num
    • list
  23. The statement if [ -d file ] will be true, if the file:
    • Is executable
    • Exists
    • Is writable
    • Is a directory
  24. Which of the following file test statement conditions is NOTcorrect?
    • -d filename tests if the file is in the current directory
    • -x filename tests a file to determine if it is executable
    • -w filename tests a file to determine if it is writable
    • -e filename tests if the file exist
  25. A user wants to execute a script called test1_script. What type of permission does she need on the test1_script file?
    • Read and execute
    • Read and write
    • Read only
    • Write only
  26. Command substitution can be used to insert the output of a command as another command’s argument.True or False?
    • True
    • False

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