LINUX ESSENTIALS 010-150 BEST STUDY GUIDE 2019

Which command can be used to abnormally terminate a script with a specific status? A. Exit B. Stop C. End D. Term Correct answer- A Which one of the following statements are NOT true of the /etc/shadow file on a Linux system? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. It contains an account's expiration information. B. It does not contain the UIDs of the users on the system. C. All the users on the system have read access to this file. D. It contains the password for accounts in hashed format. Correct answer- C A text file keeps records in the following format: field1 | field2 | field3 | field4 Which of the following commands will you use to display only the information in the second field for all the records in the file? Note: Assume the name of the file to be . A. cut -f 2 B. cut -f 2 -d "|" C. echo | cut -f 2 D. cut -c 2 Correct answer- B Which of the following information can NOT be displayed using the netstat command? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. Routing table B. List of open ports C. Round-trip network travel time D. Network interface information Correct answer- C Which of the following symbols can be used to write multi-line commands on the Linux terminal? A. & B. | C. D. ; Correct answer- C The file does not exist in the current working directory. What happens when the nano command is executed? A. The editor starts but displays an error message in the status bar. B. The editor does not start and displays an error message on the terminal. C. The editor starts and displays the message "Warning: no write permission" in the status bar. D. The editor starts and displays the message "New File" in the status bar. Correct answer- D Where do most drivers exist on a Linux system? A. Linux kernel B. Configuration files C. Libraries D. Firmware Correct answer- A Which of the following programming languages is implemented as a compiled language? A. Bash shell B. Python C. C++ D. Perl Correct answer- C Which of the following commands can be used to display the configuration of the first Ethernet device? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. ifconfig eth1 B. NULL C. ifconfig ethernet D. ifconfig or ifconfig eth0 Correct answer- D Which of the following options cause cp to prompt before overwriting an existing file? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. -p B. -i or --interactive C. NULL D. -f Correct answer- B Which archive format is NOT supported by tar? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. gzip B. xz C. zip D. bzip2 Correct answer- C Which of the following is a common server program? A. GIMP B. GNOME C. LibreOffice D. Samba Correct answer- D Which of the following makes a good password? A. Name of a character from the user's favorite book B. The user's username C. None of these D. User's telephone number Correct answer- C Which of the following characters in a file's permission string identifies it as a symbolic link? A. @ B. w C. r D. l Correct answer- D Which usermod options are used to move a user's home directory (files included) to a new location? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. -u B. -l C. NULL D. -d or -m Correct answer- D Which of the following legal areas governs general ideas, independent of their specific implementation? A. Trade secret B. Copyright C. Patent D. Trademark Correct answer- C Which Linux distribution is most likely to be found in use on a cell phone? A. Fedora B. CentOS C. Android D. Debian Correct answer- C Which of the following wc options displays the number of characters in a file? A. -w B. -c C. -m D. -l Correct answer- C Which one of the following is NOT a Linux native filesystem that holds the majority of a Linux installation? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. ReiserFS B. ext4fs C. JFS D. HFS Correct answer- D Which of the following keystrokes inserts a blank line below the current line in vi's command mode? A. i B. :wq C. o D. ZZ Correct answer- C Consider the following text file: When writing a scrt in Linux, the first line of the scrt must specify the shell to be used to execute the scrt. The first line on the scrt generally starts with the #! characters. Using the vi editor, which of the following commands replaces all occurrences of the word scrt to script? A. :s/scrt/script B. :s/script/scrt/g C. :s/script/scrt D. :%s/scrt/script/g Correct answer- D What is globbing in Linux? A. Using absolute file references B. Using relative file references C. Use of wildcards in filename specifications D. Referring to files using symbolic links Correct answer- C Which one of the following does NOT use a Linux-based embedded operating system? A. Network appliance B. Desktop C. Android D. TiVo Correct answer- B Which of the following stores the exit status of the most recently executed command? A. $0 B. $2 C. $? D. $1 Correct answer- C Which of the following commands creates the subdir directory's parent directory if it doesn't already exist? A. mkdir -a ~/parent/subdir B. mkdir -p ~/parent/subdir C. mkdir -R ~/parent/subdir D. mkdir --recursive ~/parent/subdir Correct answer- B Which of the following programs are Linux file managers? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. Nautilus & Dolphin B. Apache C. NULL D. Thunderbird Correct answer- A Which of the following commands displays only the current user's username? A. who B. w C. whoami D. who am i Correct answer- C Consider the following command and its output: # userdel -f ucertify userdel: user ucertify is currently logged in Which of the following statements is correct for the given shell entry? A. The output is invalid, the userdel command will not execute without root privileges. B. The ucertify user is currently logged in and hence its account is not deleted. C. Since, the user is logged in, only the user's files are deleted, but not the account. D. The account is deleted, even though it was in use. Correct answer- D Which of the following filetype codes identifies a normal data file such as graphics? A. b B. d C. - D. c Correct answer- C Which of the following directories contains system configuration files on a Linux system? A. /root B. /home C. /etc D. /tmp Correct answer- C Which of the following commands searches through man pages and displays a short description of the matching keyword? A. less B. whereis C. locate D. whatis Correct answer- D Which of the following commands displays the memory usage by a system? A. du B. df C. ps D. free Correct answer- D Which file on a Linux system contains lines similar to the following? domain nameserver 192.168.1.1 A. /etc/hosts B. /etc/ C. /etc/fstab D. /etc/services Correct answer- B Which of the following is true of a file with the SUID bit set? A. The file runs with the permission set on the group members of a file, instead of the executor of the file. B. The file runs with the permission set on the owner of a file, instead of the executor of the file. C. Files can be modified only by the owner of the file. D. Files cannot be deleted by other users. Correct answer- B Which of the following IS NOT an MP3 player in Linux? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. Audacious B. Banshee C. Amarok D. Blender Correct answer- D Which of the following man sections contains information about file formats? A. 1 B. 3 C. 5 D. 9 Correct answer- C Which top command is used to change a process's priority? A. k B. M C. P D. r Correct answer- D A script accepts two arguments, username and year, specified in that order. Which of the following will you use to access the year in the script? A. $2 B. $year C. $1 D. $0 Correct answer- A In which of the following ways can companies NOT legally make money using GPLed software? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. By selling technical support services associated with GPLed software B. By selling a mix of GPLed software and proprietary software C. By offering to add features to GPLed software for a price D. By incorporating GPLed software into a proprietary program that a company sells Correct answer- D Where did the Linux kernel originate? A. American Telephone and Telegraph B. The University of California C. The University of Helsinki D. The Massachusetts Institute of Technology Correct answer- C Which of the following organizations bases its philosophy on software licensing on a strong moral imperative that users should be able to modify their software? A. OSI B. BSD C. FOSS D. FSF Correct answer- D You're unable to execute a script named using the ./ command in the terminal. Which of the following is the most probable cause of this issue? A. The bash command is missing before ./. B. Scripts can't be executed in the terminal. C. The execute permissions are not set on the script. D. Script files ending with .sh extension can only be executed in the sh shell. Correct answer- C Which of the following files contains information about the user accounts in a Linux computer? A. /etc/users B. /etc/hosts C. /etc/passwd D. /etc/ Correct answer- C Which of the following statements is true of the /etc/skel directory? A. The files in this directory are automatically copied to a new user's home directory when the user is created. B. This directory contains the default configuration settings for the root user. C. The contents of this directory are copied to each user's home directory at system start. D. This directory contains configuration files that define how users log into the system. Correct answer- A Which of the following groupadd options are used to create a new group with a specific group ID? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. -f B. -r C. -g or --gid D. NULL Correct answer- C Which find command options can be used to locate files owned by a specific user? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. -u B. -uid or -user C. NULL D. -name Correct answer- B Which of the following package management tools belong to the Red Hat family of the PMS tools? A. rpm or yum B. NULL C. dpkg D. apt-get Correct answer- A Which of the following directory references refers to the current directory's parent directory? A. ../ B. / C. ~/ D. /parent/ Correct answer- A Which pager is used to view man pages, one page at a time? A. locate B. less C. whatis D. apropos Correct answer- B Which interface can be used to transmit digital audio/video data? A. DVD B. HDMI C. VGA D. DVI Correct answer- B Which keyword is used to terminate a case statement? A. esac B. end C. fi D. done Correct answer- A Which hardware device forms an Ethernet LAN by linking different computers? A. Server B. Switch C. Terminal D. HDMI Correct answer- B Which of the following commands can be used to bring up a network interface? A. route B. ifconfig C. traceroute D. iwlist Correct answer- B Which of the following are core Unix tools? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. Linux kernel B. GNU tool set & X Window system C. Startup scripts D. NULL Correct answer- B Which of the following commands will change a specified file's permissions to rw-rw-rw- ? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. chmod a+rw OR chmod a=rw B. NULL C. chmod a-rw D. chmod a+x Correct answer- A What is a collection of software routines that can be used by other software called? A. Library B. Function C. Kernel D. Program Correct answer- A Which of the following options are used with the chown command to change the ownership of all the subdirectories of a specified directory? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. -dir--subdir B. -R & --recursive C. --subdir D. NULL Correct answer- B Which of the following commands DO NOT display information about CPU? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. lscpu B. cpuinfo C. cat /proc/cpuinfo D. uname -a Correct answer- B Which of the following commands can be used to rename a file? A. cp B. mv C. rm D. ln Correct answer- B Which of the following commands stores the output of the date command in a variable? A. date myvar B. date | myvar C. myvar=date D. myvar=`date` Correct answer- D Which file defines groups on a Linux system? A. /var/local/group B. /etc/grp C. /etc/group D. /etc/groups Correct answer- C Which of the following text editors can be run both in the text-mode and GUI interfaces? A. emacs B. nano C. vi D. gedit Correct answer- A Which of the following information are NOT present in the /etc/group file? (This is normally a multi-select question however I modified it so that you can only choose one answer) A. The group's password B. Name of the group C. UIDs of the users who are members of the group D. GIDs of the group Correct answer- C Which regular expression string is used to match any sequence of characters of any length? A. . B. [ ] C. .* D. * Correct answer- C Which Linux command makes an environment variable available to subshells? A. env B. sed C. echo D. export Correct answer- D In which year was the terminal emulator program that would eventually become the Linux kernel created? A. 1991 B. 1990 C. 1989 D. 1992 Correct answer- A You execute the following commands: mkdir newdir cd newdir touch What will be the effect of the touch command? A. It will generate a "File not found" error. B. Nothing, the command will return without performing any task. C. It will update the timestamps of the file in the root directory. D. A new file named will be created in the current directory. Correct answer- D What is the correct order in which permissions are represented in the permission string? A. Group, owner, world B. World, group, owner C. Group, world, owner D. Owner, group, world Correct answer- D Which option is used with the useradd command to create a user account without creating the user's home directory? A. -M B. -N C. -m D. -s Correct answer- A Which of the following utilities is used to install packages on a Debian system? A. zypper B. rpm C. yum D. dpkg Correct answer- D Which Linux command is used to display system boot time messages? A. $DISPLAY B. lspci C. dmesg D. top Correct answer- C Under which version of GPL is the Linux kernel distributed? A. 3 B. 2 C. 1 D. 0 Correct answer- B Which of the following package formats does Slackware use? A. ebuild B. Debian C. RPM D. Tarballs Correct answer- D You've created a new file, but you are unable to find that file using the locate command. Which option best explains this behavior? A. The locate command only searches for files that were on the system at the time of boot. B. The locate command only searches for system files, not user files. C. The locate command does not search for regular files. D. The database hasn't been updated yet. Correct answer- D Which of the following vi commands is used to open a new file for editing? A. :e B. :! C. :r D. :w Correct answer- A Which of the following is the machine name portion of the hostname? A. ucertify B. pete C. None of these, machine name is not a part of hostname D. com Correct answer- B Which symbol is appended with a command to run it in the background? A. | B. & C. # D. + Correct answer- B Which of the following provide a text-based environment to run commands? A. Context menus B. Desktop menus C. Panels D. Terminals Correct answer- D Which of the following redirection operators appends a command's standard output to an existing file, without overwriting the file's original contents? A. & B. 2 C. | D. Correct answer- D Which of the following files in the /var/log directory summarizes services started via SysV startup scripts? A. B. secure C. cron Correct answer- A Which of the following commands can be used to extract the contents of an archive? A. tar -cf B. tar -z C. tar -xvf D. tar -uv Correct answer- C Which command is used to retrieve user input into a variable in a Bash script? A. input B. get C. read D. inline Correct answer- C Which command displays the list of groups to which a user belongs? A. Isgroup B. Whoami C. Id D. Who Correct answer- C Which of the following can be used to access the command line? A. Terminal B. XWindow C. BIOS D. Xargs E. Firefox Correct answer- A Which of the following commands increases the number of elements in a directory A. Touch newfile OR Mkdir newdirectory B. Create newfile OR Ls newfile C. Rmdir newdirectory D. NULL Correct answer- A Which option will cause the echo command NOT to output a trailing newline? A. -e B. -s C. -p D. -n Correct answer- D Which of the following commands moves the directory ~/summer-vacation and it content to ~/vacation/2011? A. Move -R ~/summer-vacation ~/vacation/2011 B. Mv -R ~/summer-vacation ~/vacation/2011 C. Mv /home/summer-vacation /home/vacation/2011 D. Mv ~/vacation/2011 ~/summer-vacation E. Mv ~/summer-vacation ~/vacation/2011 Correct answer- E Which of the following commands can be used to create a file? A. Build B. Create C. Mkfile D. Touch E. Nico Correct answer- D Which function does a shell program serve? A. It provides a graphical environment B. It is responsible for logging a user into the system C. It receives user commands and executes them D. It is responsible for establishing a connection to another computer Correct answer- C How could one search for the file under the directory /home? A. Find /home B. Search /home -file C. Find /home -file D. Search /home E. Find /home -name Correct answer- E Which command will display running process information in realtime? A. Show current B. Process C. Ps current D. Top Correct answer- D Which of the following Linux distributions use the dpkg package management system? A. Mandriva & Red Hat B. Debian/Ubuntu C. Suse D. NULL Correct answer- B Which of the following is true about open source software? A. The freedom to redistribute copies must include binary or executable forms of the software but not the source code. B. Open source software is not for sale. C. Open source software cannot be copied for free. D. Open source software is available for commercial use. Correct answer- D What keyword is missing from the following segment of the shell script?for i in*;----cat $idone A. Run B. then C. do D. fi E. endo Correct answer- C What is the command that will show system boot time messages? A. Display system boot B. Dmesg C. messages D. Echo E. lspci Correct answer- B The following file is found in which system file?root:x:0:0::/root:/bin/bash A. /usr/bin/shadow B. /etc/password C. /etc/ D. /etc/shadow E. /etc/passwd Correct answer- E What is the number called that is used to identify a process? A. Proc Num B. PID C. PIN D. Process Entry Correct answer- B What is the output of the following command?for token in a b c; doecho -n $({token};done A. {a}{b}{c} B. $token$token$token C. A b c D. Abc E. Anbncn Correct answer- D Identify the proper device for the third partition, on the second hard disk, on the first IDE controller on a PC system. A. /dev/hdc1d2p3 B. /dev/hdb3 C. /dev/hd1b3 D. Dev/hdc1a3 E. Dev/hdc1b3 Correct answer- B What is the preferred source for the installation of new applications? A. A CD-ROM disk B. The vendor's website C. A retail store D. The vendor's version management system E. The distribution's package repository Correct answer- E Which command lists all files in the current directory that starts with a capital letter? A. Ls -uppercase-files B. Ls A-Z* C. Ls A-Z D. Ls --upercasefiles E. Ls [A-Z]* Correct answer- E What permissions are set on a file with the command chmod 654 ? A. --wxr-x--x B. -rw-r-xr-- C. -rwxrw--x D. Drw-r-xr-- E. D--wxr-x-- Correct answer- B Which command is used to make a shell variable known to subsequently executed programs? A. Announce B. Transfer C. Mv D. Env E. Export Correct answer- E After installing a new package, in which directory are you most likely find its configuration file? A. /lib B. /conf C. /usr D. /etc E. /opt Correct answer- D Which of the following commands can be used to extract files from an archive? A. Tar -vf B. Tar -e C. Tar -evf D. Tar -xvf E. Tar -v Correct answer- D Which of the following statements concerning the General Public License (GPL) is true? A. GPL software may not be used to run nuclear reactors or air traffic control systems B. The GPL is identical to the BSD license C. The GPL is designed to ensure that the source code of a software remains freely available D. If you changed a program you received under the GPL, you must send your changes to the original author for approval E. GPL software may never be sold for money Correct answer- C Which of the following hardware devices links a number of computers together to form an Ethernet LAN? A. Server B. Terminal C. Access point D. Connector E. Switch Correct answer- E Which statement about users and user groups is correct? A. There can be only one user group on a system B. A group can only have one main user C. Every user belongs at least to one user group D. Users do not have to belong to a user group Correct answer- C The output of the program date should be saved in the variable actdat. What is the correct statement? A. Actdat='date' B. Date $actdat C. Date | acdat D. Set actdat='date' E. Actdat=date Correct answer- A Which of the following commands can be used to determine the time of the last login of a given user? A. History B. Last C. Showlog D. Recent E. Login Correct answer- B How is it possible to determine if an executable file is a shell script which is ready by Bash? A. /bin/bash has to be run in debug mode B. The r bit is set C. The file line starts with #!/bin/bash D. The file must end with .sh E. Scripts are never executable files Correct answer- C Which of the following Ubuntu releases is considered most stable and fit to use for business purposes? A. Xubuntu Server B. LTS C. Kubuntu D. Xubuntu E. Ubuntu Vanilla Correct answer- B Which of the following directories is often used to store log files? A. /var B. /temp C. /dev D. /usr E. /home Correct answer- A Which Linux distribution is used as a basis for the creation of Ubuntu Linux? A. SUSE Linux B. Red Hat Linux C. Debian Linux D. Arch Linux E. Gentoo Correct answer- C Given the following directory permissions:drwxrwxrwt 14 root 11:17 tmpWhat is the letter t at the end of drwxrwxrwt indicate?