Examen hoofdstuk 9-16 meerkeuze

Question 1

The number of users logged in is in a variable called USERS. How would you test to see if 5 users are logged in?

    test $USERS = 5
    test $USERS –a 5
    test $USERS,5
    test –f USERS=5
    test $USERS –eq 5

Answer 1

test $USERS –eq 5

Question 2

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

Answer 2

If a file called /tmp/foo exists, process_data won’t be run

process_data will be called at most once

Question 3

A conditional that lets you make multiple comparisons with a pattern is called:

    fanout
    if
    branch
    case
    test

Answer 3

case

Question 4

What is the meaning of $(( $i + 1)) ?

If i is 0, the loop will stop
This will return the value of the first argument to the script
1 will be added to the i variable
This runs the command stored in variable i
This will return the value of the next argument to the script

Answer 4

1 will be added to the i variable

Question 5

How would you write a test that says “if /tmp/foo is a directory or USERS is greater than 5”?

    test –d /tmp/foo | $USERS > 5
    test /tmp/foo –d –o $USERS -gt 5
    test /tmp/foo || $USERS > 5
    test –d /tmp/foo –o $USERS –gt 5
    test –f /tmp/foo –o $USERS –ge 5

Answer 5

test –d /tmp/foo –o $USERS –gt 5

Question 6

A division of a hard drive may be referred to as a _______ .
(choose two)

partition
label
slice
block

Answer 6

partition

slice

Question 7

Which of the following are valid partitioning types?
(choose two)

MBR
PC
GPT
BIOS

Answer 7

MBR

GPT

Question 8

The fdisk command is a tool used for working with the MBR partitioned disks.
True or False?

True
False

Answer 8

True

Question 9

Which of the following is the valid device file name for the first IDE hard drive on the system?

/dev/sda
/dev/hd1
/dev/hda
/dev/ide

Answer 9

/dev/hda

Question 10

Which of the following are valid video cable connector types?
(choose two)

AMD
DVI
VGA
HDA

Answer 10

DVI

VGA

Question 11

A command that will continuously update statistics about running processes:

top
tail
bottom
head

Answer 11

top

Question 12

The following are valid Linux option styles:
(choose three)

Traditional Unix with a single dash (-)
BSD Unix without a dash
DOS slash (/)
GNU long options with two dashes (–)

Answer 12

Traditional Unix with a single dash (-)
BSD Unix without a dash
GNU long options with two dashes (–)

Question 13

Which file contains the information passed to the kernel at boot time?

/proc/kargs
/proc/kernel
/proc/kopts
/proc/cmdline

Answer 13

/proc/cmdline

Question 14

To make changes permanent for kernel parameter files found under /proc/sys, the following file can have entries added to it:

/etc/sysctl.conf
/etc/procctl.conf
/etc/procsys.conf
/etc/sysinfo.conf

Answer 14

/etc/sysctl.conf

Question 15

To get a list of all packages installed on a system using RPM Package Management you can execute:

rpm -qa
rpm -ql
rpm -qf
rpm -qi

Answer 15

rpm -qa

Question 16

Which of the following would be considered a host?

The computer’s hard drive
A network cable
A CDROM
A printer attached to the network via an IP address

Answer 16

A printer attached to the network via an IP address

Question 17

What option to the netstat command has information shown as numbers rather than names?

-t
-n
–name
-r

Answer 17

-n

Question 18

Which of the following commands will allow you to log into the machine server1 with the account name nick?

ssh nick@server1
ssh nick->server1
ssh nick-server1
ssh nick&server1

Answer 18

ssh nick@server1

Question 19

The RSA key fingerprint allows the dig command to connect to remote systems.
True or False?

True
False

Answer 19

False

Question 20

Which files contain user account information?
(choose two)

/etc/shadow
/etc/group
/etc/passwd

Answer 20

/etc/shadow

/etc/passwd

Question 21

Sudo privileges can be used to specify which user can use the sudo command to execute commands as other users.
True or False?

True
False

Answer 21

True

Question 22

In distributions that do not allow the root user to login directly or via the su command, the installation process automatically configures one user account to be able to use the sudo command to execute commands as if they were executed by the root user.
True or False?

True
False

Answer 22

True

Question 23

Which of the following commands will display how long the system has been running since the last boot?
(choose two)

who
w
id
uptime

Answer 23

w

uptime

Question 24

The /etc/shadow file contains plain-text passwords.
True or False?

True
False

Answer 24

False

Question 25

Which command can be used to view the /etc/passwd file entries? getent uptime getpasswd uppasswd

Answer 25

getent

Question 26

Which command can be used to determine a user’s most recent log in? login last history shell

Answer 26

last

Question 27

Which of the following files contains encrypted user password information? /etc/usr /etc/shadow /etc/passwd /etc/group

Answer 27

/etc/shadow

Question 28

Which of the following files contains user IDs? /etc/passwd /etc/group /etc/shadow /etc/usr

Answer 28

/etc/passwd

Question 29

Which of the following files does the groupadd command use to determine the new GID when a GID isn’t specified? /etc/shadow /etc/usr /etc/passwd /etc/group

Answer 29

/etc/group

Question 30

Which of the following commands, run as root, will prevent the user bob from logging in? usermod -L bob usermod -D bob usermod -d bob usermod -l bob

Answer 30

usermod -L bob

Question 31

The chmod command can be used on a file by: The file owner and root The file owner A user that belongs to the files current group Only root

Answer 31

The file owner and root

Question 32

Which option for the chown command can be used to change the owner of a directory and all the files and directories below it? - f - R - a - r

Answer 32

-R

Question 33

The chown command will only accept one file at a time as an argument. True or False? True False

Answer 33

False

Question 34

The “execute” permission is never set on files by default. True or False? True False

Answer 34

True

Question 35

The user owner of a file will always have the same or higher permissions as “other”. True or False? True False

Answer 35

False

Question 36

A source and a hard link must be part of the same filesystem. True or False? True False

Answer 36

True

Question 37

Deleting a source file will break an associated symbolic link. True or False? True False

Answer 37

True

Question 38

A source file and a symbolic link must be part of the same file system. True or False? True False

Answer 38

False

Question 39

Which of the following commands would create a hard link, link to file? ln link file ln -s link file ln file link ln -s file link

Answer 39

ln file link

Question 40

Which of the following commands would create a symbolic link, link to file? ln link file ln -s file link ln file link ln -s link file

Answer 40

ln -s file link