Free LPI 201-450 Practice Exam with Questions & Answers | Set: 4

Name: How to Pass 201-450 Exams
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SKU: 201-450
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Questions 31

Which of the following tools are used to measure memory usage? (Choose THREE correct answers.)

Options:

mpstat

pstree

sar

top

vmstat

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Questions 32

Which commands below are useful to collect data about remote filesystem connections? (Choose TWO correct answers.)

Options:

pidstat

nfsiostat

sadf

cifsiostat

Questions 33

In capacity planning exercises, which tools assist in listing and identifying processes of interest? (Choose TWO correct answers.)

Options:

acpid

lsof

pstree

telinit

Questions 34

What mechanism does collectd use to gather monitoring information on systems?

Options:

It uses a library of plugins.

A master server connects to a collectd service on each machine to retrieve the information.

It collects its own information on each server and sends that to a master server.

It makes SNMP queries to the clients being monitored.

Questions 35

Which of the following is a side effect of extensive usage of swap space?

Options:

The root filesystem may become full because swap space is always located on the system root partition.

The overall system performance may degrade because of heavy hard disk use and memory reorganization.

Since processes always exist completely in either RAM or swap, regular RAM may become unused if the kernel does not move processes back from the swap space to memory.

The memory may become fragmented and slow down the access to memory pages. However, this can be kept to a minimum by the regular use of memfrag -d.

Applications need to restart because their virtual memory addresses change to reflect memory relocation to the swap address area.

Questions 36

In the following output, the load averages represent the system load averages for what time frames?

12:10:05 up 18 days, 19:00, 2 users, load average: 0.47, 24.71, 35.31

Options:

1, 5 and 15 minutes

1, 15 and 30 minutes

1, 15, and 30 seconds

15, 30 and 60 minutes

15, 30 and 60 seconds

Questions 37

Considering the following kernel IP routing table below, which of the following commands must be used to remove the route to the network 10.10.1.0/24? (Select TWO answers)

Kernel IP routing table

Destination Gateway Genmask Flags Metric Ref Use Iface

203.0.113.162 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0

172.16.87.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0

192.168.246.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1

10.10.1.0 192.168.246.11 255.255.255.0 UG 0 0 0 eth1

127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo

0.0.0.0 203.0.113.162 0.0.0.0 UG 0 0 0 ppp0

Options:

ip net delete 10.10.1.0/24

route del 10.10.1.0/24

route del -net 10.10.1.0/24

route del 10.10.1.0/24 gw 192.168.246.11

ip route delete 10.10.1.0/24

Questions 38

What is the command to add another IP address (192.168.1.2) to a network interface (eth0) that already has (at least) one IP address in the 192.168.1.0/24 subnet?

Options:

ip add addr 192.168.1.2/32 dev eth0

ifconfig eth0 192.168.1.2 netmask 255.255.255.255

ip addr add 192.168.1.2/32 dev eth0

ipconfig eth0 192.168.1.2

Questions 39

Which /etc/hosts.allow entries will permit access to sshd for users from the 192.168.1.0/24 subnet? (Choose TWO correct answers.)

Options:

sshd : 192.168.1.

sshd : 192.168.1

sshd : 192.168.1.0 netmask 255.255.255.0

sshd : 192.168.1.0/255.255.255.0

sshd : 192.168.1.0

Questions 40

A correctly formatted entry has been added to /etc/hosts.deny to prevent certain clients from connecting to a service but this is having no effect. What could be the cause of this? (Choose TWO correct answers.)

Options:

tcpd needs to be sent the HUP signal.

The service needs to be restarted.

The machine needs to be restarted.

There is a conflicting entry in /etc/hosts.allow.

The service does not support tcpwrapper.