XK0-005無料問題集「CompTIA Linux+ Certification」

質問 1

An administrator is troubleshooting a database service outage that was reported by a monitoring system. Given the following output:
$ systemctl status mariadb
Oct 20 16:40:45 comptia systemd[1]: mariadb.service: Main process
exited, code=killed, status=9/KILL
Oct 20 16:40:45 comptia systemd[1]: mariadb.service: Failed with result
'signal'. Oct 20 16:40:50 comptia systemd[1]: Stopped MariaDB 10.3
database server.
$ dmesg
[ 1061.491433] oom-
kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0
,global_oom, task_memcg=/system.slice/mariadb.service,
task=mysqld,pid=1981,uid=27 [ 1061.491453] Out of memory: Killed
process 1981 (mysqld) total-vm:330668kB, anon-rss:31316kB, file-
rss:OkB, shmem-rss:OkB, UID:27 pgtables:324kB oom_score_adj:0
Which of the following is the reason for the outage?

（A）The server is missing the DMA bus

（B）The server does not have enough physical memory

（C）The database cannot write anything else to the storage

（D）The administrator sent a kill signal to the database

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 2

Users are experiencing high latency when accessing a web application served by a Linux machine. A systems administrator checks the network interface counters and sees the following:

Which of the following is the most probable cause of the observed latency?

（A）A connection problem exists on the network interface.

（B）The network interface is disconnected.

（C）No IP address is assigned to the interface.

（D）The gateway is unreachable.

正解：A 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 3

A junior systems administrator is diagnosing an issue with latency. The administrator issues the command at a terminal and receives the following output: mtr www.comptia.org

Given this scenario and the output, which of the following should be reported to the network team for investigation? (Choose two.)

（A）Host 3 is set to filter ICMP reply packets.

（B）Host 1 is set to filter ICMP echo packets.

（C）Host 2 is experiencing high packet loss, indicating the link is overloaded.

（D）Host 2 is experiencing low bandwidth, indicating the ISP is blocking traffic.

（E）Host 3 is set to filter ICMP echo packets.

（F）Host 1 is set to filter ICMP reply packets.

正解：C、E 解答を投票する

質問 4

A Linux administrator needs to analyze a failing application that is running inside a container.
Which of the following commands allows the Linux administrator to enter the running container and analyze the logs that are stored inside?

（A）docker exec -d app /bin/bash

（B）docker run -ti app /bin/sh

（C）podman exec -ti app /bin/sh

（D）podman run -d app /bin/bash

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 5

A systems administrator wants to list all local account names and their respective UIDs. Which of the following commands will provide output containing this information?

（A）cut -n: -f1,2 /etc/passwd

（B）cut -d: -s2,3 /etc/passwd

（C）cut -d: -f1,3 /etc/passwd

（D）cut -c: -f3,1 /etc/passwd

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 6

Which of the following files would a junior systems administrator check to verify DNS server settings?

（A）/etc/rsolveconf

（B）/etc/nsswitch,conf

（C）/etc/network

（D）/etc/hosts

正解：A 解答を投票する

質問 7

A systems administrator observes high latency values when reaching a remote web server.
Which of the following commands will help determine and isolate issues on the network side?

（A）netstat

（B）dig

（C）mtr

（D）route

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 8

Which of the following is the best tool for dynamic tuning of kernel parameters?

（A）tuned-adm

（B）tuned

（C）turbostat

（D）tune2fs

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 9

A Linux administrator is configuring network traffic forwarding. Despite having proper iptables rules, the traffic forwarding is not working. Which of the following commands will allow Linux to pass network traffic between different interfaces?

（A）modprobe ip_forward

（B）ip route forward allow --all-interfaces; systemctl restart network

（C）nmcli allow-forwarding eth0

（D）echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf; sysctl -p

正解：D 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 10

Linux system users report that over the past few months, a server has stopped responding at least twice each day. Every time this happens, the users have to restart the server to recover it. A systems administrator diagnosing the issue collects the following outputs:
csharp
Output 1
[Tue Aug 31 16:36:42 2021] oom-killer invoked by java: gfp_mask=0x280da2 order=0, oom_score_adj=0
[Tue Aug 31 16:36:42 2021] java cpuset=/ mems_allowed=0 makefile
Output 2
[root@server]# free -m
total used free shared buff/cache available
Mem: 15819 15026 174 92 619 134
Swap: 0 0 0
Which of the following is the best permanent resolution for the system?

（A）More network bandwidth

（B）More memory resources

（C）Extended root filesystem

（D）More CPU resources

正解：B 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 11

The ability to add web servers dynamically during peak user activity and remove them when user activity decreases is an example of:

（A）inventory management

（B）build automation

（C）configuration automation

（D）infrastructure automation

正解：C 解答を投票する

質問 12

An administrator added the port 2222 for the SSH server on myhost and restarted the SSH server. The administrator noticed issues during the startup of the service. Given the following outputs:

Which of the following commands will fix the issue?

（A）chcon system_u:object_r:ssh_home_t /etc/ssh/*

（B）firewall-cmd -- zone=public -- add-port=2222/tcp

（C）semanage port -a -t ssh_port_t -p tcp 2222

（D）iptables -A INPUT -p tcp -- dport 2222 -j ACCEPT

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

質問 13

A Linux user is trying to execute commands with sudo but is receiving the following error:
$ sudo visudo
>>> /etc/sudoers: syntax error near line 28 <<<
sudo: parse error in /etc/sudoers near line 28
sudo: no valid sudoers sources found, quitting
The following output is provided:
# grep root /etc/shadow
root:*LOCK*:14600::::::
Which of the following actions will resolve this issue?

（A）Log in to the system using the other regular user, switch to root, and comment out line 28 from
/etc/sudoers.

（B）Boot the system in single user mode and comment out line 28 from /etc/sudoers.

（C）Log in directly using the root account and comment out line 28 from /etc/sudoers.

（D）Comment out line 28 from /etc/sudoers and try to use sudo again.

正解：B 解答を投票する

質問 14

A Linux administrator is tasked with implementing a solution that will centralize information and allow it to be searchable and available for reporting purposes.
Which of the following server roles should the administrator implement?

（A）DNS

（B）Logging

（C）SSH

（D）NTP

（E）Proxy

正解：B 解答を投票する

質問 15

A technician wants to configure a Unix server as a gateway firewall. The technician has implemented the proper ACLs and port address translation policies, but network traffic is not passing from the LAN to the WAN.
Which of the following should the technician configure to for this issue?

（A）DenyHouse

（B）Squid-service

（C）Ip_forward

（D）/etc/service

正解：A 解答を投票する

質問 16

Using AD Query, the security gateway connections to the Active Directory Domain Controllers using what protocol?

（A）Hypertext Transfer Protocol Secure (HTTPS)

（B）Windows Management Instrumentation (WMI)

（C）Lightweight Directory Access Protocol (LDAP)

（D）Remote Desktop Protocol (RDP)

正解：C 解答を投票する

解説: (JPNTest メンバーにのみ表示されます)

XK0-005 無料問題集「CompTIA Linux+ Certification」

弊社を連絡する

関連リンク

トップ試験