TEST BORRADO, QUIZÁS LE INTERESE: linux cap 1-16
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linux cap 1-16 Descripción: examen final Autor:
Fecha de Creación: 07/06/2017 Categoría: Otros Número Preguntas: 64 |
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One of the jobs of the kernel is to Manage the system’s resources Turn source code into machine code Load the operating system after the computer is turned on Transfer mail from one machine to another. Unix is: (choose two) An operating system A trademark A distribution of Linux A text editor A type of hardware. Linux is written in: C NET C++ Java Perl. Source code refers to: The version of a program that the computer runs on the CPU The license that dictates how you may use and share the software The interface that software uses to talk to the kernel A human readable version of computer software. What is the standard option to provide a command line program to view its documentation? –info –doc –help -h. The command man -k is the same as the command apropos. True or False? True False. The whatis command is the same as man -w. True False. The directory where additional documentation for software packages most likely can be found is: /var/lib/doc /usr/software/doc /usr/share/doc /var/share/doc. Hidden files are files that begin with what character? A plus (+) A dash (-) A period (.) An asterisk (*). What option for the ls command will display all files, including hidden files? -w -H -L -a. The top-level directory on a Linux system is represented as: / /root /home C:. Is the following path absolute or relative? /etc/ppp Relative Absolute. Is the following path absolute or relative? sysadmin/Documents Relative Absolute. Compression on a file works by: Removing the high order bit from each byte Removing redundant information Storing most of the data on removable media and just leaving a pointer Eliminating gaps within the file Consolidating multiple files into one. In general, for which of the following would you want to use lossless compression? An mp3 audio file An encrypted email A JPEG image A log file A movie. Lossy compression: (choose three) Is often used with documents Sacrifices some quality Usually results better compression than lossless Is often used with images Decompresses to an identical version as the original. You type gzip myfile.tar. What happens? (choose two) myfile.tar.gz holds a compressed version of myfile.tar An error; you forgot to pass the name of the output file An error; you forgot to specify the file with –f myfile.tar is unarchived into the current directory myfile.tar is removed. Error messages generated by commands are sent where by default? STDIN Log files STDERR STDOUT. A successful command will print output to STDOUT. True or False? True False. Which of the following commands will direct error messages to the file, error.log? (choose one) ls /root > error.log ls /root $> error.log ls /root >> error.log ls /root 2> error.log. A pipe allows you to… …send the same input to multiple commands. …send the output of one command to another. …send the output of a command to a file. …type multiple commands at one prompt. Channel 2 is: STDERR STDIN STDALL STDOUT. The echo command: Tests a variable for duplication Is used for variable assignment Is used to output text to the console Copies variables from one to another Duplicates the input stream to the output stream. A file begins with #!/bin/csh. This means: C Shell compatibility mode is enabled Running the script will invoke /bin/csh to interpret the rest of the file The operator should not be using /bin/csh This is a Perl script Nothing, this is a comment. Which are appropriate editors for writing shell scripts? (choose two) nano /bin/bash vi Firefox LibreOffice Writer. Most of nano’s commands take the form of: Escape followed by another character Mouse clicks The F1 through F12 function keys Alt and another character Control and another character. What does this shell script do? FOO=/tmp/foo if [ ! –d $FOO ]; then mkdir $FOO fi Nothing, since there is a problem with the conditions in the if statement Creates /tmp/foo if it does not exist Creates /tmp/foo and raises an error if there is a problem Outputs a message to the screen Makes the /tmp/foo directory if a file by that name exists. Which of the following are valid CPU types for Intel-based platforms? (choose two) 48 bit 24 bit 64 bit 32 bit. 64 bit platforms can access more memory than 32 bit platforms. True or False? True False. What does the acronym RPM mean? Relocate Package Manager Return Package Management RPM Package Management Recursive Package Manager. One way to install new software on a Linux system is to use a package management system. True or False? true false. When you execute the dmesg command, the system displays messages that are generated by the kernel. True or False? true false. Which of the following are package management commands for distributions with software distributed in files ending in .deb? (choose three) rpm apt-get dpkg aptitude. Which of the following are package management commands for distributions with software distributed in files ending in .rpm? (choose three) yum apt-get rpm yumex. Which of the following would be considered a host? A printer attached to the network via an IP address A CDROM The computer’s hard drive A network cable. A service is… …a file that contains configuration information. …another name for a computer’s hostname. …a feature provided by one computer to another. …like an IP address. A network packet contains … (choose two) …the IP address of the destination machine. …the IP address of the source machine. …the name of the router. …a hard drive partition. Only servers have hostnames. True or False? true false. Which files contain user account information? (choose two) /etc/passwd /etc/group /etc/shadow. Which user can view the /etc/shadow file? the root user No users Any member of the password group All users. Which command will display the UID, GID and groups your current user belongs to? whoami id who about. Each user belongs to at least one group. true false. Which command will display the users that are currently logged in to the system? who about id whoami. UIDs 1-500 are usually reserved for what kind of users? Are not used for user accounts, but for group accounts System accounts, such as server processes Remote log-in accounts Log-in (human) users. If a user is deleted, the files and directories that the user owned… …are deleted as well. …will have no UID owner. …will show a UID as the owner, but not user name. …will have no user owner. Which of the following options for the useradd command allows root to specify the UID to be associated with the account? -g -u -U -G. Which of the following options for the useradd command allows root to specify supplementary groups the user will be a member of? -u -G -g U. On a system that does not use UPG, the useradd command will also create a user group. For example, user bob, group bob. True or False? true false. Which of the following commands set “other” permissions on file to r-x? chmod o+rx file chmod o-r-w file chmod o=r+x file chmod o=rx file. Which of the following commands sets “other” permissions on file to r-x? chmod 774 file chmod 776 file chmod 775 file chmod 777 file. Only one set (user, group, other) of permission can be changed at once using the symbolic method. True or False? true false. Which of the following are methods for setting permissions using the chmod command? (choose two) letter octal symbolic binary. The chown command can be used to change the owner and group of a file. True or False? true false. The Samba application is a: Mail Server Security Server File Server Web Server. Which of the following are examples of desktop software? (choose two) Web server Web browser File share Compiler Music player. If you wanted to set up a blog, which software would be most helpful? MySQL Postfix WordPress Dovecot Samba. Which of the following pieces of software deal with file sharing? (choose three) NFS PostgreSQL X-Windows Netatalk Samba. If you wanted to create and print an invoice, which software could you use? GNOME Evolution Firefox LibreOffice Compiz. Which of the following is true about graphical mode? (choose three) You have menus and tools to help you find what you are looking for You access this mode by logging into a graphical display After login, you are provided with a command prompt After login, you are provided with a desktop You cannot use your mouse. Which of the following is provided by a graphical interface that isn’t normally provided to a non graphical interface? (choose four) Desktop Menus Popups Windows Shell. A server is likely to be running in graphical mode. True or False? true false. In graphical mode, you can get to a shell by running which applications? (choose two) guiterm gbash terminal xconsole xterm. Which of the following are traits of a multiuser operating system? (choose three) An administrative user gets a dedicated CPU Each user can only log in once per day Many users can log in simultaneously with a unique account Resources are shared between users Users can protect their information from other users. Given the following script: while [ ! –f /tmp/foo ]; do echo –n “.” process_data > /tmp/foo done Which of the following are true? (choose two) The screen will fill with dots. /tmp/foo will be removed if it exists process_data will never be run If a file called /tmp/foo exists, process_data won’t be run process_data will be called at most once. |
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