What is the command to remove read and write permissions for the group and others from a file?

$-`$chmod go$-$rw filename$`$

$-`$chmod gu$+$rw$`$

$-`$chmod gu$-$rw$`$

$-`$chmod go$-$rw$`$

$2.$ The TCP$/$IP model does not have $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ layer, but the OSI model has this layer.

$-$ Application layer

$-$ Session layer

$-$ None of the above

$-$ Transport layer

$3.\_\_\_\_\_\_\_\_\_\_\_$ command is the syntax to change the password of a user called manAyaala.

$-`$pword manAyaala$`$

$-`$ps manAyaala$`$

$-`$password manAyaala$`$

$-`$passwd manAyaala$`$

$4.$ Which of these users have complete control over the system, including the ability to modify system files, install software, and perform administrative tasks?

$-$ Group

$-$ System

$-$ Regular

$-$ Root

$5.$ Firms that allow employees to use their own devices are embracing which of the following?

$-$ BYOD

$-$ Mobile consolidation

$-$ Cloud computing

$-$ Wearable computing

$6.$ Which of these is a fundamental purpose of a loopback address?

$-$ Isolation

$-$ Development and testing

$-$ All of the above

$-$ Local testing

$7.$ In which file does the actual password hashes stored in Ubuntu?

$-/$etc$/$shadow

$-/$etc$/$password

$-/$etc$/$passwd

$-/$etc$/$shadow$.$config

$8.$ What is not a challenge to a system administrator?

$-$ Automated Backups

$-$ Providing a comfortable environment for users.

$-$ Planning and implementing adequate security.

$-$ Developing ways of fixing errors and problems which occur.

$9.$ Which of these is a feature of a network operating system?

$-$ Protocol Support

$-$ Monitoring and Troubleshooting

$-$ Directory service

$-$ All of the above

$10.$ The fields in the password file are $\_\_\_\_\_\_\_\_\_\_$ separated.

$-$ Colon

$-$ Comma

$-$ None of the above

$-$ Semi$-$Colon

$11.$ The user with complete control over the system, including the ability to modify system files, install software, and perform administrative tasks, is known as $\_\_\_\_\_\_\_\_\_\_\_.$

$-$ Group

$-$ System

$-$ Regular

$-$ Root

$12.$ When a file or directory is owned by a group, all members of that group $\_\_\_\_\_\_\_\_\_\_\_\_$ the permissions associated with the group.

$-$ Advance

$-$ Sustain

$-$ Inherit

$-$ Maneuver

$13.$ Which of these commands can be used to view the account aging information for a specific user?

$-$ chnge

$-$ change

$-$ chage

$-$ chge

$14.$ Which of these is not a reason for updates to be automated?

$-$ All of the above

$-$ Completeness

$-$ Scale

$-$ Deploy

$15.$ The $\_\_\_\_\_\_\_\_\_\_\_\_\_\_$ command can be used to view detailed information about a user called Ayaala.

$-$ fig Ayaala

$-$ finger Ayaala

$-$ f Ayaala

$-$ figer Ayaala

$16.$ A device designed to provide services or resources to other devices on the network is considered as $\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$-$ Infrastructure

$-$ Mobile device

$-$ Workstation

$-$ Server

$17.$ Which of these commands can help you display your working directory after logging into the system?

$-$ pwd

$-$ ls

$-$ cat

$-$ dtory

$18.$ Which of these are strategies for bringing server resources to an organization?

$-$ All eggs in one basket

$-$ All of the above

$-$ Beautiful snowflakes

$-$ Buy in bulk, allocate fractions

$19.$ If you wanted to have $12$ subnets with a Class C network ID$,$ which subnet mask would you use?

$-255\mathrm{.}255\mathrm{.}255\mathrm{.}255$

$-255\mathrm{.}255\mathrm{.}255\mathrm{.}252$

$-255\mathrm{.}255\mathrm{.}255\mathrm{.}240$

$-255\mathrm{.}255\mathrm{.}255\mathrm{.}248$

$20.$ Which of these is a feature of the software patch?

$-$ Add a new feature

$-$ Close security holes

$-$ Fix bugs

$-$ All of the above

$21.$ The physical layer is concerned with$\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

$-$ Application to application delivery

$-$ None of the above

$-$ Process to process delivery

$-$ Bit$-$by$-$bit delivery

$22.$ What is the group name of this entry in a group file $$adm:x:$4$:syslog,username$1.$

$-$ Syslog

$-$ Adm

$-$ X

$-$ Username$1$

$23.$ Which of these users of Ubuntu are non$-$users?

$-$ Group

$-$ System

$-$ Regular

$-$ Root

$24.$ Which of these is a device that acts as a connection point between computers and can filter and forward data to a specified destination?

$-$ Router

$-$ NIC

$-$ Hub

$-$ Switch

$25.$ This octets of IPV$411000001000010110000101111101111$ represent which class of the following IP addresses?

$-$ A

$-$ D

$-$ C

$-$ B

$26.$ Software that manages the resources of the computer is called $\_\_\_\_\_\_\_\_\_\_\_\_.$

$-$ Application software

$-$ Network software

$-$ Operating system software

$-$ Data management software