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Total Questions 20
Each question carry 1 mark
Must answer all the questions (otherwise report card will not be generated)
If you dont want to take a test, simply click the check answers button and view all the answers with explanations
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1. Which command allows you to join an AD domain from the command line?

A.
join
B.
ipa-client-install
C.
realm
D.
adjoin

Correct Answers :

[C]

Explanation :

You can use the realm command to join an Active Directory domain. It relies on the realmd service, which in current state is still in an early development stage.

2. You are on a server that does not have an /etc/sssd/sssd.conf file with authentication settings. In which file would you expect to find the settings that tell your server to authenticate on LDAP?

A.
/etc/ldap.conf
B.
/etc/openldap/openldap.conf
C.
/etc/krb5.conf
D.
/etc/nslcd.conf

Correct Answers :

[D]

Explanation :

Systems that do not use sssd for authentication normally use the nslcd service to authenticate.

3. Which of the following variables in /etc/sysconfig/authconfig is not required to set up authentication using the sssd backend?

A.
TUSESSSDAUTH
B.
USESSSD
C.
USEPAMACCESS
D.
FORCELEGACY

Correct Answers :

[C]

Explanation :

USEPAMACCESS specifies that PAM should be used for authentication. It is not related to the authentication backend that is used.

4. Where does the LDAP client look for the CA certificate to connect to the LDAP server?

A.
/etc/ldap.conf
B.
/etc/ldap/certs
C.
/etc/ldap/cacerts
D.
/etc/openldap/cacerts

Correct Answers :

[D]

Explanation :

Explanation: Systems that do not use sssd for authentication normally use the nslcd service to authenticate.

5. Which configuration file can you use to specify that the sssd service should be used as the authentication backend service?

A.
/etc/authconfig.conf
B.
/etc/sssd/authconfig.conf
C.
/etc/sysconfig/authconfig
D.
/etc/sssd/sssd.conf

Correct Answers :

[C]

Explanation :

You can use the realm command to join an Active Directory domain. It relies on the realmd service, which in current state is still in an early development stage.

6. When setting up an LIO iSCSI target, different steps need to be performed. Which of the following commands comes first?

A.
create iqn.2014-11.com.example:target
B.
tgp1/acls/ create iqn.2014-11.com.example:server1
C.
fileio/ create file /root/diskfile1 1G
D.
luns/ create /backstores/block/block1.

Correct Answers :

[C]

Explanation :

Before configuring anything, you need to make sure the backend storage is available.

7. Which firewall port must be opened on the iSCSI target server to allow access to the shared storage device?

A.
3128
B.
2160
C.
3260
D.
3821

Correct Answers :

[C]

Explanation :

The iSCSI target by default is listening on port 3260.

8. What is the name where you would configure the iSCSI initiator name?

A.
/etc/iscsi/iscsid.conf
B.
/etc/iscsi/iscsi-initiator.conf
C.
/etc/iscsi/initiatorname.iscsi
D.
/etc/initiatorname.conf

Correct Answers :

[C]

Explanation :

The initiatorname is stored in the file /etc/iscsi/initiatorname. iscsi.

9. Which statement about iSCSI initiator discovery is not true?

A.
If you know the initiatorname already, you do not have to perform a discovery.
B.
The results of the isicsi discovery are stored in /var/lib/iscsi.
C.
Discovery results are stored persistent.
D.
The iSCSI discovery process shows the IQN of the iSCSI target.

Correct Answers :

[A]

Explanation :

iSCSI discovery is a mandatory process that ensures that the iSCSI target name is stored locally.

10. Which of the following commands shows correct syntax for getting as many details as possible about a current session?

A.
iscsiadm -m session -P 3
B.
iscsiadm --mode -P 1
C.
iscsiadm --mode node -P 2
D.
iscsiadm --mode session -P 4

Correct Answers :

[A]

Explanation :

Explanation:

To get details about each of the iSCSI modes, the -P option can be used. A higher number as an argument to -P gives more detail. Session details are requested in the session mode, which has 3 as the highest detail level.

11. Which utility would you use to show detailed performance statistics for specific processes?

A.
iostat
B.
vmstat
C.
mpstat
D.
pidstat

Correct Answers :

[D]

Explanation :

The pidstat utility shows detailed performance statistics for specific processes.

12. Which command shows usage information about the /dev/sda device only and does that 10 times with a 2 second interval?

A.
iostat -c /dev/sda 2 10
B.
iostat -c /dev/sda 10 2
C.
iostat -d /dev/sda 2 10
D.
iostat -d /dev/sda 10 2

Correct Answers :

[C]

Explanation :

The option -d is used for device usage statistics only. The numeric arguments are used to first specify the interval and next the number of polling loops.

13. Which tool would you use if you want to know if swap space currently is being used actively?

A.
iostat
B.
mpstat
C.
memstat
D.
vmstat

Correct Answers :

[D]

Explanation :

The vmstat utility gives detailed memory usage information, which includes information about the number of blocks being moved between RAM and swap space.

14. You are typing sar -P 0 to show CPU usage statistics, but you get no results. Which of the following is the most likely explanation?

A.
You are typing the wrong command.
B.
The sysstat service hasn’t been started.
C.
You have just installed the sysstat package and not enough data has been gathered yet to show results.
D.
The sar database hasn’t been built yet.

Correct Answers :

[C]

Explanation :

The sar command works on data that has been collected in the /var/log/sa directory. If the sysstat package has just been installed, there will not be any data yet to show results.

15. Which file do you need to change if you want to store performance data for usage in sar for longer than the 28 days?

A.
/etc/sysstat.conf
B.
/etc/sysstat/sar.conf
C.
/etc/sysconfig/sysstat
D.
/etc/cron.d/sysstat.

Correct Answers :

[C]

Explanation :

Startup parameters for the sysstat processes sa1 and sa2 are set in /etc/sysconfig/sysstat.

16. Which tunable would you change to increase the willingness of the Linux kernel to swap?

A.
/proc/sys/kernel/swap
B.
/proc/sys/kernel/swappiness
C.
/proc/sys/vm/swap
D.
/proc/sys/vm/swappiness

Correct Answers :

[D]

Explanation :

The /etc/sysctl.d is the preferred location for applying changes to the sysctl configuration. You should not make modifications to /usr/lib/sysctl.d, which is for. Answer A is deprecated, but also works.

17. Where would you specify the tunables that have to be activated automatically when booting?(Choose two)

A.
/etc/sysctl.conf
B.
/usr/lib/sysctl.d
C.
/etc/sysctl.d
D.
/etc/lib/sysctl.d

Correct Answers :

[A, C]

Explanation :

18. What is the most efficient way to get an overview of sysctl tunables?

A.
sysctl -p
B.
sysctl -a
C.
sysctl -l
D.
sysctl -v

Correct Answers :

[B]

Explanation :

The sysctl -a command prints all current sysctl settings. This command is very useful in combination with grep to find the correct settings.

19. After making changes to the sysctl configuration, which command enables you to read the modifications and execute them in an easy way?

A.
sysctl -p
B.
sysctl -a
C.
sysctl -l
D.
sysctl -v

Correct Answers :

[A]

Explanation :

The sysctl -p command reads the sysctl configuration and applies changes to the runtime configuration.

20. Which sysctl command can you use to write a setting to a sysctl configuration parameter, without updating the configuration files?

A.
sysctl -w
B.
sysctl -p
C.
sysctl -n
D.
sysctl -v

Correct Answers :

[A]

Explanation :

The sysctl -w command writes a new value to a sysctl parameter without updating the configuration files (which makes it of limited use).

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