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Examen final Linux Essentials

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Linux Sistemas Operativos Quiz on Examen final Linux Essentials, created by Yeredaia Miranda on 26/04/2016.
Yeredaia Miranda
Quiz by Yeredaia Miranda, updated more than 1 year ago
Yeredaia Miranda
Created by Yeredaia Miranda over 8 years ago
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Resource summary

Question 1

Question
One of the jobs of the kernel is to:
Answer
  • 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

Question 2

Question
Unix is: (choose two)
Answer
  • An operating system
  • A type of hardware
  • A trademark
  • A distribution of Linux
  • A text editor

Question 3

Question
Linux is written in:
Answer
  • C
  • .NET
  • C++
  • Java
  • Perl

Question 4

Question
Source code refers to:
Answer
  • 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

Question 5

Question
Whats is the standard option to provide a command line program to view its documentation?
Answer
  • -- info
  • -- doc
  • -- help
  • - h

Question 6

Question
The command man -k is the same as the command apropos
Answer
  • True
  • False

Question 7

Question
The whatis command is the same as man -w
Answer
  • True
  • False

Question 8

Question
The directory where additional documentation for software packages most likely can be found is:
Answer
  • /var/lib/doc
  • /usr/software/doc
  • /usr/share/doc
  • /var/share/doc

Question 9

Question
Hidden files are files that begin with what character?
Answer
  • A plus (+)
  • A dash (-)
  • A period (.)
  • An asterisk (*)

Question 10

Question
What option for the ls command will display all files, including hidden files?
Answer
  • -w
  • -H
  • -L
  • -a

Question 11

Question
The top-level directory on a Linux system is represented as:
Answer
  • /
  • /root
  • /home
  • C:

Question 12

Question
Is the following path absolute or relative? /etc/ppp
Answer
  • Relative
  • Absolute

Question 13

Question
Is the following path absolute or relative? sysadmin/Documents
Answer
  • Relative
  • Absolute

Question 14

Question
Compression on a file works by:
Answer
  • Removing the high order bit from each byte
  • Consolidating multiple files into one
  • Removing redundant information
  • Storing most of the data on removable media and just leaving a pointer
  • Eliminating gaps within the file

Question 15

Question
In general, for which of the following would you want to use lossless compression?
Answer
  • An mp3 audio file
  • A movie
  • A log file
  • A JPEG image
  • An encrypted email

Question 16

Question
Lossy compression: (choose three)
Answer
  • Is often used with documents
  • Decompresses to an identical version as the original
  • Sacrifices some quality
  • Usually results better compression than lossless
  • Is often used with images

Question 17

Question
You type gzip myfile.tar. Whats happens? (choose two)
Answer
  • 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

Question 18

Question
Error messages generated by commands are sent where by default?
Answer
  • STDIN
  • Log files
  • STDERR
  • STDOUT

Question 19

Question
A successful command will print output to STDOUT
Answer
  • True
  • False

Question 20

Question
Which of the following commands will direct error messages to the file, error.log?
Answer
  • ls /root > error.log
  • ls /root >> error.log
  • ls /root 2> error.log
  • ls /root $> error.log

Question 21

Question
A pipe allows you to...
Answer
  • ...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

Question 22

Question
Channel 2 is:
Answer
  • STDERR
  • STDIN
  • STDALL
  • STDOUT

Question 23

Question
The echo command:
Answer
  • Tests a variable for duplication
  • Duplicates the input stream to the output stream
  • Is used for variable assignment
  • Is used to output text to the console
  • Copies variables from one the another

Question 24

Question
A file begins with #!/bin/csh. This means:
Answer
  • 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

Question 25

Question
Which are appropriate editors for writing shell scripts? (choose two)
Answer
  • nano
  • LibreOffice Writer
  • /bin/bash
  • vi
  • Firefox

Question 26

Question
Most of nano's commands take the form of:
Answer
  • Escape followed by another character
  • Mouse clicks
  • The F1 through F12 function keys
  • Alt and another character
  • Control and another character

Question 27

Question
What does this shell script do? FOO=/tmp/foo if [! -d $FOO]; then mkdir $FOO fi
Answer
  • Nothing, since there is a problem with the conditions in the if statement
  • Makes the /tmp/foo directory if a file by that name exists
  • Creates /tmp/foo if it does not exist
  • Creates /tmp/foo and raises and error if there is a problem
  • Outputs a message to the screen

Question 28

Question
Which of the following are valid CPU types for Intel-based platforms? (choose two)
Answer
  • 48 bit
  • 24 bit
  • 64 bit
  • 32 bit

Question 29

Question
64 bit platforms can access more memory than 32 bit platforms
Answer
  • True
  • False

Question 30

Question
What does the acronym RPM mean?
Answer
  • Relocate Package Manager
  • Return Package Management
  • RPM Package Management
  • Recursive Package Manager

Question 31

Question
One way to install new software on a Linux system is to use a package management system
Answer
  • True
  • False

Question 32

Question
When you execute the dmesg command, the system displays messages that are generated by the kernel
Answer
  • True
  • False

Question 33

Question
Which of the following are package management commands for distributions with software distributed in files ending in .deb? (choose three)
Answer
  • rpm
  • apt-get
  • dpkg
  • aptitude

Question 34

Question
Which of the following are package management commands for distributions with software distributed in files ending in .rpm? (choose three)
Answer
  • yum
  • apt-get
  • rpm
  • yumex

Question 35

Question
Which of the following would be considered a host?
Answer
  • A printer attached to the network via an IP addres
  • A CDROM
  • The computer's hard drive
  • A network cable

Question 36

Question
A service is...
Answer
  • ...a file that constains configuration information
  • ...another name for a computer's hostname
  • ...a feature provided by one computer to another
  • ...like an IP address

Question 37

Question
A network packet contains... (choose two)
Answer
  • ...the IP address of the destination machine
  • ...a hard drive partition
  • ...the name of the router
  • ...the IP address of the source machine

Question 38

Question
Only servers have hostnames
Answer
  • True
  • False

Question 39

Question
Which files contain user account information? (choose two)
Answer
  • /etc/passwd
  • /etc/shadow
  • /etc/group

Question 40

Question
Which user can view the /etc/shadow file?
Answer
  • The root user
  • No users
  • Any member of the password group
  • All users

Question 41

Question
Which command will display the UID, GID and groups your current user belongs to?
Answer
  • id
  • whoami
  • who
  • about

Question 42

Question
Each user belongs to at least one group
Answer
  • True
  • False

Question 43

Question
Which command will display the users that are currently logged in to the system?
Answer
  • who
  • about
  • whoami
  • id

Question 44

Question
UIDs 1-500 are usually reserved for what kind of users?
Answer
  • Are not used for user accounts, but for group accounts
  • System accounts, such as server processes
  • Remote log-in accounts
  • Log-in (human) users

Question 45

Question
If a user is deleted, the files and directories that the user owned...
Answer
  • ...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

Question 46

Question
Which of the following options for the useradd command allows root to specify the UID to be associated with the account?
Answer
  • -g
  • -u
  • -U
  • -G

Question 47

Question
Which of the following options for the useradd command allows root to specify supplementary groups the user will be a member of?
Answer
  • -u
  • -U
  • -g
  • -G

Question 48

Question
On a system that does not user UPG, the useradd command will also create a user group. For example, user bob, group bob.
Answer
  • True
  • False

Question 49

Question
Which of the following commands set "other" permissions on the file to r-x?
Answer
  • chmod o+rx file
  • chmod o-r-w file
  • chmod o=r+x file
  • chmod o=rx file

Question 50

Question
Which of the following commands sets "other" permissions on file to r-x?
Answer
  • chmod 774 file
  • chmod 776 file
  • chmod 775 file
  • chmod 777 file

Question 51

Question
Onlye one set (user, group, other) of permission can be changed at once using the symbolic method
Answer
  • True
  • False

Question 52

Question
Which of the following are methods for setting permissions using the chmod command? (choose two)
Answer
  • letter
  • octal
  • symbolic
  • binay

Question 53

Question
The chown command can be used to change the owner and group of a file
Answer
  • True
  • False

Question 54

Question
The Samba application is a:
Answer
  • Mail Server
  • Security Server
  • File Server
  • Web Server

Question 55

Question
Which of the following are examples of desktop software? (choose two)
Answer
  • Web server
  • Web browser
  • File share
  • Compiler
  • Music player

Question 56

Question
If you wanted to set up a blog, which software would be most helpful?
Answer
  • MySQL
  • Postfix
  • WordPress
  • Dovecot
  • Samba

Question 57

Question
Which of the following pieces of software deal with file sharing? (choose three)
Answer
  • NFS
  • X-Windows
  • Netatalk
  • Samba
  • PostgreSQL

Question 58

Question
If you wanted to create and print an invoice, which software could you use?
Answer
  • GNOME
  • Compiz
  • Firefox
  • LibreOffice
  • Evolution

Question 59

Question
Which of the following is true about graphical mode? (choose three)
Answer
  • 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

Question 60

Question
Which of the following is provided by a graphical interface that isn't normally provided to a non graphical interface? (choouse four)
Answer
  • Desktop
  • Shell
  • Windows
  • Popups
  • Menus

Question 61

Question
A server is likely to be running in graphical mode
Answer
  • True
  • False

Question 62

Question
In graphical mode, you can get to a shell by running which applications? (choose two)
Answer
  • guiterm
  • gbash
  • terminal
  • xconsole
  • xterm

Question 63

Question
Which of the following are traits of a multiuser operating system? (choose three)
Answer
  • An administrative user gets a dedicated CPU
  • Users can protect their information from other users
  • Resources are shared between users
  • Many users can log in simultaneously with a unique account
  • Each user can only log in once per day

Question 64

Question
Select all the applications that provide access to the Command Line Interface (CLI)? (choose two)
Answer
  • Virtual Terminal
  • Firefox
  • Opera
  • Windows Terminal

Question 65

Question
Which environment varible contains a list of directories that is searched for commands to execute?
Answer
  • PATH
  • EXEC
  • PS1
  • PS2

Question 66

Question
Select the command that can report the location of a command:
Answer
  • where
  • what
  • which

Question 67

Question
A pair of single quotes (') will prevent the shell from interpreting any metacharacter
Answer
  • True
  • False

Question 68

Question
The /tmp directory is a temporary directory and will not exist on a system at all times
Answer
  • True
  • False

Question 69

Question
The /var directory has files that change over time
Answer
  • True
  • False

Question 70

Question
The "sticky bit" permission...
Answer
  • ...prevents others from removing files they don't own from a common directory
  • ...changes the group ownership of existing files in a directory
  • ..prevents others from overwriting files they don't own in common directories
  • ...sets the group ownership of any new file created in a directory

Question 71

Question
Which of the following commands will set the "sticky bit" on /shared?
Answer
  • chmod 4777 /shared
  • chmod 2777 /shared
  • chmod 7777 /shared
  • chmod 1777 /shared

Question 72

Question
The "setuid" permission...
Answer
  • ...allows a command to be run as the file owner
  • ...allows file in a directory to be manipulated as by the directory owner
  • ...prevents the owner of a file from being changed
  • ...reports the output of a script to the owner
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