最新なLpi 201-450問題集（162題）、真実試験の問題を全部にカバー！

質問 1：
What is the purpose of an initramfs during the Linux system start?
A. It creates a ram disk to store volatile data for directories like /tmp to reduce writes to disk
B. It copies the root file system's content to RAM to speed up the system and reduce writes to disk
C. It loads required modules and starts sub sytems like LVM to make the root file system accessible to the kernel
D. It moves the kernel from normal system memory to initram memory to speed up kernel access
正解：C

質問 2：
The following is an excerpt from the output of tcpdump -nli eth1:
1 3:03:17.277327 IP 192.168.123.5.1065 > 192.168.5.112.21: Flags [.], ack 1 (truncated)
1 3:03:17.598624 IP 192.168.5.112.21 > 192.168.123.5.1065: Flags [P.], seq (truncated) Which network service or protocol was used?
A. DHCP
B. SSH
C. HTTP
D. FTP
E. DNS
正解：D

質問 3：
A Linux server running systemd booted to rescue.target for maintenance. Which commands are used to restore the server to its usual target? (Choose two.)
A. systemctl reboot
B. telinit 0
C. systemctl emergency
D. systemctl default
E. sync
正解：B,D

質問 4：
Why is the root file system mounted read-only during boot and remounted with write permission later on?
A. Because this way crackers cannot collect information about root with boot sniffers.
B. To avoid other operating systems overwriting the Linux root partition.
C. To avoid writing to the disk, unless the root password is known.
D. Because if problems with the root file system are detected during the boot, fsck can be run, without risk of damage.
E. Because the disk has its own write protection that cannot be changed by the operating system.
正解：D

質問 5：
What is the purpose of the command vgextend?
A. Increase the number of days between scheduled error checking.
B. Add physical volumes to an existing volume group.
C. Extend a volume group's footprint on disk.
D. Create a volume group which uses all available space on disk.
正解：B

質問 6：
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. 36.6
B. 0
C. 100
D. 35.9
E. 57.7
正解：B

質問 7：
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. vmstat
B. top
C. ps aux
D. uptime
E. freemem
正解：B