Redhat Certified Linux Engineer (RHCE) Certification Exam free online test With Explanations and report card for free Part 2| Infibee.com

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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. You want to switch off the feature that sends messages from journald to rsyslogd. How do you do this?

A.
Switch off the imuxsock module in rsyslog.conf.
B.
ipa-client-install
C.
Set ForwardToSyslog=no in /etc/systemd/journald.conf.
D.
Set UseSyslog=no in /etc/systemd/journald.conf.

Correct Answers :

[C]

Explanation :

The /etc/systemd/journald.conf file contains several parameters, including ForwardToSyslog , which can be used to switch off the feature that forwards messages to rsyslogd.

2. Which of the following is not among the typical benefits of using a central log server?

A.
When using a remote log server, you do not have to run rsyslogd locally.
B.
Messages that are stored on a remote log server cannot be accessed by intruders anymore.
C.
On a remote log server, logrotate can be configured to keep messages for a longer period.
D.
On a remote log server, lots of disk space can be allocated for storing log files.

Correct Answers :

[A]

Explanation :

Even if a remote log server is used, a local rsyslogd process is still required to forward messages to the remote log server.

3. What is the default port that is used for communication between log servers?

A.
514
B.
524
C.
1024
D.
1514

Correct Answers :

[A]

Explanation :

To configure remote logging, port 514 is used. Either a TCP or a UDP port can be configured.

4. What would be a valid reason to send messages to a remote log server using UDP and not TCP?

A.
By using UDP a significant reduction of network bandwidth use can be obtained.
B.
UDP is more secure than TCP.
C.
Using UDP ensures that your log server can also receive messages from legacy servers or devices that are supporting UDP only.
D.
UDP does not require the loading of additional modules in rsyslog.conf.

Correct Answers :

[C]

Explanation :

Explanation: Old syslog implementations support sending messages to a log server only over port 514 UDP.

5. Apart from loading the imtcp module in rsyslog.conf on the log server, which configuration line is required to allow for log reception over TCP?

A.
$TCPServerRun 514
B.
$InputTCPServerRun 514
C.
@TCPServerRun 514
D.
@InputTCPServerRun 514

Correct Answers :

[B]

Explanation :

The InputTCPServerRun allows messages to be accepted through TCP. This statement needs to start with a $ and have the port name as its argument.

6. What would be the IPv6 link local address for an interface that has the MAC address 02:0c:29:e4:71:4a?

A.
20c:29ff:fee4:714a
B.
fe80::20c:29ff:fee4:714a
C.
2000::20c:29ff:fee4:714a
D.
2000:fffe:20c:29e4:714a

Correct Answers :

[B]

Explanation :

In a link-local address, the network prefix fe80/64 is used, which is followed by the MAC address with fffe inserted in the middle of the MAC address.

7. Which command enables you to ping all IPv6 nodes that are on the local network that is connected through the eth0 interface?

A.
ping6 fe80::1%eth0
B.
ping6 fe80::1 eth0
C.
ping6 ff02::1%eth0
D.
ping6 ff02::1 eth0

Correct Answers :

[C]

Explanation :

The ff02::1 IPv6 address is the all nodes IPv6 address. Use %eth0 to specify that the network connected to interface eth0 must be addressed.

8. Which items are wrong in the following command (choose multiple)?
nmcli con add con-name eno16777736 type ethernet ifname
eno16777736 ipv6 2002:db:0:1::100/64 gw6 2002:db:0:1::1 ipv4
192.16 8.4. 122/24 gw4 192.16 8.4. 1 ?

A.
gw6 should be gwv6 .
B.
gw4 should be gwv4 .
C.
ipv6 should be ip6 .
D.
ipv4 should be ip4 .

Correct Answers :

[C, D]

Explanation :

When adding new configuration to an interface, ip6 , gw6 , ip4, and gw4 should be used. When modifying existing configuration, use ipv6 , ipv4 , gwv6 , and gwv4 .

9. After setting an IPv6 address, which command enables you to make sure that the interface does not try to get an address using DHCP anymore?

A.
nmcli con mod ifname method manual
B.
nmcli mod ifname manual
C.
nmcli con ifname method manual
D.
nmcli con mod ifname ipv6.method manual.

Correct Answers :

[D]

Explanation :

The first argument to nmcli is con , to refer to the connection that should be modified. This is followed by the action that is performed on that interface (in this case, mod , to modify the interface configuration). Then the name of the interface follows, which is followed by ipv6.method that needs to be set to manual .

10. How do you enable packet forwarding on interfaces on an RHEL 7 host?

A.
There need to be static entries for all routes that packets have to be forwarded to.
B.
Use echo 1 > /proc/sys/net/ipv4/ip_forward to enable kernel-level IP forwarding.
C.
Make sure that the radvd service is started to route packets.
D.
Use echo 1 > /proc/sys/net/routing .

Correct Answers :

[B]

Explanation :

Explanation:

The /proc/sys/net/ipv4/ip_forward parameter is set to 1 to enable packet forwarding on RHEL 7.

11. What is used to close an if loop?

A.
end
B.
exit
C.
stop
D.
fi

Correct Answers :

[D]

Explanation :

A conditional loop that is started with if is closed with fi .

12. What is missing in the following script at the position of the dots?
if [ -f $1 ]
then
echo "$1 is a file"
..... [ -d $1 ]
then
echo "$1 is a directory"
else
echo "I do not know what \$1 is" fi

A.
else
B.
if
C.
elif
D.
or

Correct Answers :

[C]

Explanation :

If within an if loop a new conditional check is opened, this conditional check is started with elif .

13. What is missing in the following script at the position of the dots?
for (( counter=100; counter>1; counter-- )); .......
echo $counter
done
exit 0

A.
in
B.
do
C.
run
D.
start

Correct Answers :

[B]

Explanation :

After stating the condition in a for loop, do is used to start the commands that need to be started when the condition is true.

14.Which command is used to send a message with the subject “error” to the user root if something didn’t work out in a script?

A.
mail error root
B.
mail -s error roo
C.
mail -s error root .
D.
mail -s error root < .

Correct Answers :

[D]

Explanation :

The mail command needs its subject specified with the -s option. The mail command normally waits until a dot is entered on an empty line to start sending the message. This dot can be fed to the mail command using STDIN redirection, using < .

15. In a case statement, it is a good idea to include a line that applies to all other situations. Which of the following would do that?

A.
*)
B.
*
C.
else
D.
or

Correct Answers :

[A]

Explanation :

In a case statement, the different options are proposed with a ) behind them. *) refers to all other options (not specifically specified in the script).

16. Which of the following shows the correct syntax for writing log messages to syslog, where all log messages are prefixed with SSH ATTEMPT , the log priority is set to notice , and a maximum of two packets per minute is logged?

A.
firewall-cmd --zone=dmz --add-rich-rule=’rule service name=“ssh” log prefix=“SSH ATTEMPT:” level=“notice” limit value=“2/m” accept
B.
firewall-cmd --zone=dmz --add-rich-rule=’rule service name=“ssh” log prefix=“SSH ATTEMPT:” facility=“notice” limit=“2/m” accept
C.
firewall-cmd --zone=dmz --add-rich-rule=’rule service name=“ssh” log prefix=“SSH ATTEMPT:” level=“notice” limit=“2/m” accept
D.
firewall-cmd --zone=dmz --add-rich-rule=’rule service name=“ssh” log prefix=“SSH ATTEMPT:” facility=“notice” limit value=“2/m” accept

Correct Answers :

[A]

Explanation :

Answer A shows the correct syntax.

17. Which statement about port forwarding is true?

A.
To configure port forwarding, rich rules must be used.
B.
Port forwarding can be configured only on a router.
C.
To configure port forwarding to another host, masquerading must be configured as well for the return packets.
D.
To configure port forwarding, the --add-port option must be used in firewall-cmd .

Correct Answers :

[C]

Explanation :

If port forwarding to another host is configured, the return packets must be taken care of by using masquerading.

18. Which of the following shows the correct syntax for masquerading?

A.
firewall-cmd --permanent --zone= --add-rich-rule=’rule family=ipv4 source address=10.0.0.0/24 masquerade’
B.
sysctl -a
C.
firewall-cmd --permanent --zone= --addrule=’rule family=ipv4 source address=10.0.0.0/24 masquerade’
D.
firewall-cmd --permanent --zone= --add-rich-rule=’rule family=ip4 source address=10.0.0.0/24 masquerade’

Correct Answers :

[A]

Explanation :

Answer A is the only answer that does not contain errors.

19. Which statement about masquerading is true?

A.
Masquerading must be configured on the public zone.
B.
Masquerading can be configured for IPv4 as well as IPv6.
C.
Masquerading requires a public IP address to be set on the external interface.
D.
Masquerading requires the masquerading host to be configured as a router.

Correct Answers :

[A]

Explanation :

Masquerading can be used only on a router.

20. Which of the following is the typical location for custom firewalld service files?

A.
/etc/systemd/system
B.
/usr/lib/firewalld/services
C.
/etc/firewalld/services
D.
/etc/firewalld

Correct Answers :

[C]

Explanation :

Custom firewalld service files should be stored in /etc/ firewalld/services.

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