LFCS無料問題集「Linux Foundation Certified System Administrator」

質問 1

Which of the following commands preloads and manages keys that are used for automatic authentication while logging in to other machines using SSH?

（A）ssh-keygen

（B）ssh-add

（C）sshd

（D）ssh-agent

正解：D 解答を投票する

質問 2

What is the purpose of the Filesystem Hierarchy Standard?

（A）It defines a common internal structure of inodes for all compliant filesystems.

（B）It is a distribution neutral description of locations of files and directories.

（C）It provides unified tools to create, maintain and manage multiple filesystems in a common way.

（D）It is a security modelused to ensure files are organized according to their permissions and accessibility.

正解：B 解答を投票する

質問 3

Which run levels should never be declared as the default run level when using SysV init? (Choose TWO correct answers.)

（A）3

（B）5

（C）1

（D）6

（E）0

正解：D、E 解答を投票する

質問 4

Which of the following fields are available in both the global /etc/crontab file as well as in user-specific crontab files? (Select TWO correct answers)

（A）Command

（B）Username

（C）Minute

（D）Year

正解：A、C 解答を投票する

質問 5

Each entry in a crontab must end with what character?

（A）Backslash

（B）Space

（C）Tab

（D）Newline

正解：D 解答を投票する

質問 6

Which of the following commands reboots the system when using SysV init? (Choose TWO correct answers.)

（A）shutdown -k now "rebooting"

（B）shutdown -r "rebooting"

（C）shutdown -r now

（D）telinit 0

（E）telinit 6

正解：C、E 解答を投票する

質問 7

CORRECT TEXT
The presence of what file will temporarily prevent all users except root from logging into the system? (Specify the full name of the file, including path.)

正解：

/etc/nologin

質問 8

Which of the following commands creates an ext3 filesystem on /dev/sdb1? (Choose TWO correct answers.)

（A）/sbin/mkfs -c ext3 /dev/sdb1

（B）/sbin/mke2fs -j /dev/sdb1

（C）/sbin/mkfs -t ext3 /dev/sdb1

（D）/sbin/mke3fs -j/dev/sdb1

正解：B、C 解答を投票する

質問 9

CORRECT TEXT
What is the default name of the configuration file for the Xorg X11 server? (Specify the file name only without any path.)

正解：

xorg.conf

質問 10

CORRECT TEXT
What word is missing from the following SQL statement?
insert into tablename ________(909, 'text');
(Please specify the missing word using lower-case letters only.)

正解：

VALUES,
values

質問 11

CORRECT TEXT
What command displays all aliases defined in the current shell? (Specify the command without any path information)

正解：

alias, alias -p

質問 12

What is true about the file /etc/localtime?

（A）It is a plain text file containing a string such as Europe/Berlin.

（B）It is created and maintained by the NTP service based on the geolocation of the system's IP address.

（C）It is either a symlink to or a copy of a timezone information file such as /usr/share/zoneinfo/Europe/Berlin.

（D）It is a symlink to /sys/device/clock/ltime and always contains the current local time.

正解：C 解答を投票する

質問 13

Which of the following commands connects to the remote host example.com which has OpenSSH listening on TCP port 2222? (Choose TWO correct answers.)

（A）ssh -o GatewayPort=2222 example.com

（B）ssh -p 2222 example.com

（C）ssh example.com:2222

（D）ssh --port 2222 example.com

（E）ssh -o Port=2222 example.com

正解：B、E 解答を投票する

質問 14

Which of the following commands should be added to /etc/bash_profile in order to change the language of messages for an internationalized program to Portuguese (pt)?

（A）export MESSAGE="pt"

（B）export UI_MESSAGES="pt"

（C）export LC_MESSAGES="pt"

（D）export LANGUAGE="pt"

（E）export ALL_MESSAGES="pt"

正解：C 解答を投票する

質問 15

Which of the following files, located in the user home directory, is used to store the Bash history?

（A）.history

（B）.bash_histfile

（C）.history_bash

（D）.bash_history

（E）.bashrc_history

正解：D 解答を投票する

質問 16

CORRECT TEXT
Which signal is missing from the following command that is commonly used to instruct adaemon to reinitialize itself, including reading configuration files?
killall -s _______ daemon

正解：

HUP,
SIGHUP, 1

質問 17

What is the first program that is usually started, at boot time, by the Linux kernel when using SysV init?

（A）/etc/rc.d/rcinit

（B）/sbin/init

（C）/lib/init.so

（D）/proc/sys/kernel/init

（E）/boot/init

正解：B 解答を投票する

質問 18

CORRECT TEXT
After configuring printing on a Linux server, the administrator sends a test file to one of the printers and it fails to print. What command can be used to display the status of the printer's queue? (Specify ONLY the command without any path or parameters.)

正解：

lpq, /usr/bin/lpq, lpstat, /usr/bin/lpstat

質問 19

Which of the following are valid stream redirection operators within Bash? (Choose THREE correct answers.)

（A）>>>

（B）%>

（C）>

（D）<

（E）<<<

正解：C、D、E 解答を投票する

LFCS 無料問題集「Linux Foundation Certified System Administrator」

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