LPI 201-450 Exam Questions

Questions for the 201-450 were updated on : Sep 09 ,2024

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Question 1

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

  • A. acpid
  • B. lsof
  • C. pstree
  • D. telinit
Answer:

B, C

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Question 2

In the following output from top, which processes contribute to the percentage of time that the CPU
spends in the state of wa?
Tasks: 193 total, 1 running, 190 sleeping, 2 stopped, 0 zombie
Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 98.2%id, 1.0%wa, 0.0%hi, 0.0%si, 0.0%st

  • A. Processes waiting for user interaction.
  • B. Processes that were already closed and are waiting to be launched again.
  • C. Processes that have not been scheduled yet because they haven't been fully loaded into RAM or are in swap.
  • D. Processes waiting for IO operations to complete.
Answer:

D

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Question 3

In the below example output, which columns detail the percent of time the CPU spent running non-
kernel code and the percent of time the CPU spent running kernel code? (Choose TWO correct
answers.)
# vmstat 1 100
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0

  • A. id
  • B. us
  • C. wa
  • D. sy
Answer:

B, D

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Question 4

In the following output, what percentage of time was the CPU waiting for pending I/O?
# vmstat 1 100
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0

  • A. 0
  • B. 100
  • C. 35.9
  • D. 57.7
  • E. 36.6
Answer:

A

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Question 5

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

  • A. pidstat
  • B. nfsiostat
  • C. sadf
  • D. cifsiostat
Answer:

B, D

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Question 6

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

  • A. 1, 5 and 15 minutes
  • B. 1, 15 and 30 minutes
  • C. 1, 15, and 30 seconds
  • D. 15, 30 and 60 minutes
  • E. 15, 30 and 60 seconds
Answer:

A

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Question 7

When planning a web server which of the following choices will impact system sizing? (Choose
THREE correct answers.)

  • A. How many concurrent users are expected.
  • B. Which hardware vendor has better Linux support.
  • C. What type of content will be served.
  • D. What scripting languages will the web server support.
  • E. Will the OS install be CD, DVD or network based.
Answer:

A, C, D

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Question 8

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

  • A. It uses a library of plugins.
  • B. A master server connects to a collectd service on each machine to retrieve the information.
  • C. It collects its own information on each server and sends that to a master server.
  • D. It makes SNMP queries to the clients being monitored.
Answer:

A

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Question 9

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

  • A. mpstat
  • B. pstree
  • C. sar
  • D. top
  • E. vmstat
Answer:

C, D, E

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Question 10

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

  • A. The root filesystem may become full because swap space is always located on the system root partition.
  • B. The overall system performance may degrade because of heavy hard disk use and memory reorganization.
  • C. 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.
  • D. 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.
  • E. Applications need to restart because their virtual memory addresses change to reflect memory relocation to the swap address area.
Answer:

B

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Question 11

In this example output, which descriptions match the purpose of the free, buff and cache columns?
(Choose THREE correct answers.)
# vmstat 1 100
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 282120 134108 5797012 0 0 0 2 0 0 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 359 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1117 577 0 0 100 0
0 0 0 282120 134108 5797012 0 0 0 0 1007 366 0 0 100 0

  • A. Used swap space
  • B. RAM available for filesystem buffers
  • C. Available free RAM
  • D. RAM used for buffers
  • E. RAM used for filesystem cache
Answer:

C, D, E

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Question 12

In the following output, what is the 5 minute load average for the system?
# uptime
12:10:05 up 18 days, 19:00, 2 users, load average: 0.47, 24.71, 35.31

  • A. 0.47
  • B. 24.71
  • C. 35.31
  • D. There is no 5 minute interval. It is some value between 0.47 and 24.71.
  • E. There is no 5 minute interval. It is some value between 24.71 and 35.31.
Answer:

B

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Question 13

Which of the following commands will provide the PIDs of the processes sorted by which are using
the most CPU cycles on the Linux system?

  • A. top
  • B. uptime
  • C. ps aux
  • D. vmstat
  • E. freemem
Answer:

A

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Question 14

Which command will report information on memory usage, paging and block input/output?

  • A. free
  • B. memshow
  • C. ps
  • D. top
  • E. vmstat
Answer:

E

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Question 15

When is historical data of resource usage important? (Select THREE correct answers.)

  • A. Predicting when resources will need to be increased.
  • B. Selecting a computer vendor.
  • C. Identifying processes killed during out of memory occurrences.
  • D. Diagnosing capacity problems.
  • E. Troubleshooting a software problem.
Answer:

A, D, E

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