Red Hat RH033 Online Practice Questions and Exam Preparation

Red Hat RH033 Online Questions & Answers

• Question 51:

  Which of the following commands will you use to change the home directory of a user and move all of its contents to the new home directory?

  A. usermod -d -m
  B. usermod -g
  C. usermod -o -u
  D. usermod -u
  A. usermod -d -m

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  Explanation/Reference:

  The usermod -d -m command is used to change the home directory of a user as well as move all of its contents to the new home directory.

• Question 52:

  Which of the following utilities can be used to manage dictionaries?

  A. tee
  B. cat
  C. aspell
  D. dict
  C. aspell

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  Explanation/Reference:

  aspell is a utility that can function as an ispell -a replacement, as an independent spell checker, as a test utility to test out Aspell features, and as a utility for managing dictionaries.

  Syntax:

  aspell [options]

  Some important options used with aspell are as follows:

  

  The following options may be used with the aspell command to control which dictionaries to use and how they behave:

  

  Answer option A is incorrect. The tee command is used to split the output of a program so that it can be seen on the display and also be saved in a file. It can also be used to capture intermediate output before the data is altered by another

  command or program. The tee command reads standard input, then writes its content to standard output, and simultaneously copies it into the specified file(s) or variables. The syntax of the tee command is as follows: tee [-a] [-i] [File] where,

  the -a option appends the output to the end of File instead of writing over it and the -i option is used to ignore interrupts.

  Answer option B is incorrect. The concatenate (cat) command is used to display or print the contents of a file.

  Syntax:

  cat filename

  For example, the following command will display the contents of the /var/log/dmesg file:

  cat /var/log/dmesg

  Note: The more command is used in conjunction with the cat command to prevent scrolling of the screen while displaying the contents of a file. Answer option D is incorrect. There is no such utility as dict in Linux.

• Question 53:

  You work as a Network Administrator for McNeil Inc. The company has a Linux-based network. You have just created a directory named Sales on a file server. David, a Sales Manager, has to use this directory to keep sales reports. David

  reports that he is unable to save his reports in the directory.

  When you list the directory using the LS command, you get the following result:

  drwxr-xr-x 2 root root 2048 Jan 2 2006 Sales What is the most likely cause?

  A. David does not have the Write permission on the directory.
  B. David is working on his local computer's login.
  C. The Sales directory has been deleted by accident.
  D. The Sales directory is not properly mounted.
  A. David does not have the Write permission on the directory.

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  Explanation/Reference:

  The most likely cause of the issue is that David does not have the Write permission on the Sales directory. The listing of the directory shows that root is the owner of the Sales directory. The permissions on the Sales directory are rwxr-xr-x. The permission character set has three sets of three permissions that are Read, Write, and Execute. The first set, which is rwx, represents the

  Read, Write, and Execute permissions to the owner of the file. The second set, which is r-x, provides the Read and Execute permissions to the group root. The third set, which is r-x, provides the Read and Execute permissions to other users.

  In order to resolve the issue, you will have to make David the owner of the Sales directory. For this, you will have to run the following command:

  chown david sales

  After becoming the owner of the directory, David will automatically get the Write permission, and he will be able to store his files in the directory.

  Setting permissions on files and folders in Linux

  Answer option B is incorrect. As the listing shows that David is not the owner of the folder, this will not make any difference.

  Answer options D and C are incorrect. According to the question, the directory is properly listed, and mounting or deletion is not an issue.

• Question 54:

  You work as the Network Administrator for McNeil Inc. The company has a Linux-based network.

  You are working as a root user on Red Hat operating system. You are currently running a program named My_program. You are getting some error messages while executing the program. You want to redirect these error messages to a file named file2 rather than being displayed on the screen.

  Which of the following tools should you use to accomplish the task?

  A. My_program >> file2
  B. My_program 2> file2
  C. My_program 2>> file2
  D. My_program > file2
  B. My_program 2> file2

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  Explanation/Reference:

  This command will execute a program named My_program and whatever errors are generated while executing that program will all be added to a file named file2 rather than being displayed on the screen.

  What is redirection of STDIN, STDOUT, STDERR in Linux? Redirection means diverting data from their normal destination to another. Whenever a program is executed on terminal some output is displayed at the shell prompt. In case a user

  does not want that output to appear in the shell window, the user can redirect it elsewhere. The user can redirect the output into a file, printer, etc. Not only the output of programs is redirected, but also input of a program and error messages

  are redirected to a file.

  Common Redirection operators are as follows:

  

  Answer option D is incorrect. This command will direct the standard output of My_program to file2. Answer option A is incorrect. This command will append the standard output of My_program to file2. Answer option C is incorrect. This command cannot be applied in this scenario.

• Question 55:

  Which of the following options is used with aspell to specify the location of the main word list?

  A. d,--master=string
  B. -p,--personal=file
  C. --jargon=string
  D. --dict-dir=dir
  D. --dict-dir=dir

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  Explanation/Reference:

  The following options may be used with the aspell command to control which dictionaries to use and how they behave:

  

• Question 56:

  Which of the following commands is most useful for viewing large files?

  A. cp
  B. cat
  C. less
  D. touch
  C. less

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  Explanation/Reference:

  The less command is most useful for viewing large files. The less command displays the output of a file one page at a time. Viewing large files through cat may take more time to scroll pages, so it is better to use the less command to see the

  content of large files. Answer option B is incorrect. The cat command is also used to view the content of a file, but it is most useful for viewing short files.

  Answer option A is incorrect. The cp command is used to copy files and directories from one location to another.

  Answer option D is incorrect. The touch command is not used to view the content of a file. It is used to create empty files or to update file timestamps.

• Question 57:

  You work as the Network Administrator for McNeil Inc. The company has a Linux-based network.

  You are working a root user on the Red Hat operating system. You want to search for files named snow.html, Snow.html, SNOW.html in the current directory. Which of the following commands should you use to accomplish the task?

  A. find -iname snow.html
  B. find -name snow.html
  C. find name snow.html
  D. find -i snow.html
  A. find -iname snow.html

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  Explanation/Reference:

  If no path is given, find looks in the current directory and its subdirectories. Using the -i option tells the find command to perform caseinsensitive search for files named snow.html.

  It will show all files named snow.html, Snow.html,

  SNOW.html in the current directory.

  Answer option B is incorrect. This command will only search for files named snow.html in the current directory with case-sensitiveness. It will not search for those files named Snow.html, SNOW.html.

  Answer option C is incorrect. This is an incorrect command; it will show an error message. Answer option D is incorrect. This is also an incorrect command, there should be a name after -i in the command.

• Question 58:

  You work as a Technician for Net World Inc. The company has a Linux-based network. You have configured a file server on the company's etwork. You want to summarize disk usage of each file in a particular directory on the file server. Which of the following commands will you use?

  A. du
  B. fsck
  C. df D. dfsck
  A. du

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  Explanation/Reference:

  The du command is used to summarize disk usage. The du command displays the number of blocks used for files. If the File parameter specified is actually a directory, the disk usage of all files within the directory are summarized. If no File

  parameter is provided, the du command uses the files in the current directory. Answer option C is incorrect. The df command reports information about space on file systems.

  Answer option B is incorrect. The fsck command checks file system consistency and interactively repairs the file system.

  Answer option D is incorrect. The dfsck command checks and repairs two file systems simultaneously on different drives.

• Question 59:

  You work as a Network Administrator for Blue Bell Inc. The company has a Linux-based network. You are working on a Linux computer. You get the following listing on your computer:

  rwxr-xr-x 2 rick user 15 May 3 3:12 file92

  How many hard links have been created for file92?

  A. 2
  B. 3
  C. 15
  D. 12
  A. 2

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  Explanation/Reference:

  The second column in the listing shows the number of hard links created for the file.

• Question 60:

  Which of the following environmental variables represents the PID value of the last child process?

  A. $?
  B. $!
  C. $!!
  D. $$
  B. $!

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  Explanation/Reference:

  The $! environmental variable represents the PID value of the last child process. Answer option D is incorrect. The $$ environmental variable represents the PID of the running shell.

  Answer option A is incorrect. The $? environmental variable results in the value zero if the last command was executed successfully, otherwise it displays the value one. Answer option C is incorrect. It is an invalid Linux standard

  environmental variable.