Red Hat RH033 Online Practice Questions and Exam Preparation

Red Hat RH033 Online Questions & Answers

• Question 31:

  You work as the Network Technician for Tech Perfect Inc. The company has a Linux-based network.

  You are currently working on vim. You opened a file in four windows in a single vim screen. You want to jump from one window to another. Which of the following key-combinations should you use to accomplish the task?

  A. Ctrl-w, v
  B. Ctrl-w, s
  C. Ctrl-w with an arrow key
  D. Ctrl-w, q
  C. Ctrl-w with an arrow key

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  Explanation/Reference:

  Ctrl-w key-combination with an arrow key is used to jump from one window to another. This will move you to the next window in whichever direction the arrow would normally move your cursor. Instead of the arrow keys, you can also use vi's

  traditional h, j, k and l keys for the same effect. Answer options B and A are incorrect. Ctrl-w, s and Ctrl-w, v key-combinations are used to view a file in two windows in a single vim screen.

  Ctrl-w, s splits the screen horizontally and Ctrl-w, v splits the screen vertically. Answer option D is incorrect. Ctrl-w, q is used to quit from your current window.

• Question 32:

  Fill in the blank with the appropriate permission to complete the statement below.

  __________ is Linux access permission flag bit that allows users to run an executable file with the permissions of the executable's owner.

  SUID

  Explanation/Reference:

  Set user ID is the Linux access permission flag bit that allows users to run an executable file as the permissions of the executable's owner. When the Set user ID (SUID) bit is set and a user executes the file, the user will have the same rights

  as the owner.

  If the Set user ID bit is set and the owner has the execute permission, the 'x' in the owner permissions is replaced by 's'. If the Set user ID bit is set and the owner has no execute permission, the 'x' is replaced by 'S'.

  For example:

  -rwsrw----The owner has the execute permission and the SUID bit is set. -rwSr----- The SUID bit is set, but the owner has no execute permission.

• Question 33:

  Which of the following commands is used to mount file systems?

  A. detach
  B. attach
  C. mount
  D. umount
  C. mount

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  Explanation/Reference:

  In Linux, the mount command is used to mount and display disks, partitions, and file systems.

  Mounting refers to the process in which the operating system prepares the media to be read.

  Note: The swap file system cannot be mounted using the mount command. Answer option D is incorrect. In Linux, the UMOUNT command is used to unmount a file system from its mount point.

  Answer options A and B are incorrect. There are no such commands as attach and detach in Linux.

• Question 34:

  John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. John is working as a root user on the Linux operating system. He is configuring the Apache Web server settings. He does not want the commands being used in the settings to be stored in the history. Which of the following commands can he use to disable history?

  A. history !!
  B. set +o history
  C. history !N
  D. set -o history
  B. set +o history

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  Explanation/Reference:

  According to the scenario, John can use the set +o history command to disable history. Answer option D is incorrect. John cannot use the set -o history command to accomplish his task.

  This command is used to enable disabled history.

  Answer option A is incorrect. John cannot use the history !! command to accomplish his task. This command is used to see the most recently typed command. Answer option C is incorrect. John cannot use the history !N command to

  accomplish his task. This command is used to display the Nth history command.

  What is the history command?

  In the bash shell, the history command is used to view the recently executed commands. History is on by default. A user can turn off history using the command set +o history and turn it on using set -o history. An environment variable

  HISTSIZE is used to inform bash about how many history lines should be kept. The following commands are frequently used to view and manipulate history:

  

• Question 35:

  You work as the Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. You are a root user on the Red Hat operating system. You want to keep an eye on the system log file /var/adm/messages. Which of the following commands should you use to read the file in real time?

  A. tail -f /var/adm/messages
  B. tail /var/adm/messages
  C. cat /var/adm/messages
  D. tail -n 3 /var/adm/messages
  A. tail -f /var/adm/messages

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  Explanation/Reference:

  Using the -f option causes tail to continue to display the file in real time, showing added lines to the end of the file as they occur. What is the tail -f command? The tail command is used to display the last few lines of a text file or piped data. It has a special command line option

• Question 36:

  You have recently been appointed as a Network Administrator for Rick International Inc. The company has a Linux-based network. You have to print an important file named secure.txt urgently.

  You therefore want to know what printers are currently configured on your computer and how you can connect to them.

  Which of the following commands will you use to accomplish the task?

  A. lpstat -p
  B. lpstat -s
  C. lpstat -d
  D. lpr
  B. lpstat -s

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  Explanation/Reference:

  You will use the lpstat -s command to accomplish the task. The lpstat -s command gives you information about what printers are configured on your computer and how you can connect to them.

  Answer option A is incorrect. The lpstat -p command is used to list the printers configured on your computer.

  Answer options C and D are incorrect. The lpstat -d and lpr commands are used to list the default printer on your computer.

• Question 37:

  You work as the Network Administrator for Perfect solution Inc. The company has a Linux- based network. You are a root user on the Red Hat operating system. You want to see only 10 results in a search for files that have an .html extension. Which of the following commands should you use to accomplish the task?

  A. locate "*.html"
  B. locate 10 .html
  C. locate -n 10 "*.html"
  D. locate "*.html" -q
  C. locate -n 10 "*.html"

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  Explanation/Reference:

  The locate command queries a database for all pathnames which match the specified pattern. The

• Question 38:

  All network interface settings are stored in /etc/sysconfig/network-scripts/ directory. Which of the following tools are used to read the interface configuration files?

  Each correct answer represents a complete solution. Choose all that apply.

  A. ifup
  B. system-config-services
  C. system-config-network
  D. ifdown
  A. ifup
  C. system-config-network
  D. ifdown

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  Explanation/Reference:

  The Interface configuration files are read by system-config-network, ifup, ifdown, and other tools that bring network interfaces up and down. Answer option B is incorrect. The system-config-services tool is used to manage services in Linux.

• Question 39:

  You want to append a tar file if the on-disk version of the tar file has a modification date more recent than its copy in the tar archive. Which of the following commands will you use to accomplish the task?

  A. tar -x
  B. tar -t
  C. tar -u
  D. tar -c
  C. tar -u

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  Explanation/Reference:

  The tar -u command is used to append a tar file if the on-disk version of the tar file has a modification date more recent than its copy in the tar archive. Answer option B is incorrect. The tar -t command is used to list the contents of an archive.

  Answer option A is incorrect. The tar -x command is used to extract the files from an archive.

  Answer option D is incorrect. The tar -c command is used to create a new archive of specified files.

• Question 40:

  You work as a Network Administrator for Perfect Solutions Inc. The company has a Linux- based network. Each Friday evening, you want to delete the temporary files on a Linux server. Which of the following actions will you perform to accomplish the task?

  A. Create a recurring CRON job to delete the temporary files on the server.
  B. Ask users to delete their temporary files daily.
  C. Ask your assistant to delete all the temporary files at the scheduled time.
  D. Use the at command to create a job to delete the temporary files on the server each Friday evening.
  A. Create a recurring CRON job to delete the temporary files on the server.

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  Explanation/Reference:

  In order to accomplish the task, you should create a recurring CRON job to delete the temporary files on the server.