CompTIA CompTIA Certifications XK0-004 Questions & Answers

• Question 121:

  A file server is sharing a directory called /share between team members inside a company. The fileshare needs to be moved from serverA to /newshare located on serverB with all permissions and attributes preserved. Which of the following commands would BEST achieve this task?

  A. rsync -aHAX /share/* serverB:/newshare

  B. dd if=/share/* of=serverB:/newshare

  C. tar -cvf /share/* serverB:/newshare

  D. mirrorlv /share/* serverB:/newshare

  Correct Answer: C

• Question 122:

  An administrator notices a directory on a web server named /var/www/html/old_reports that should no longer be accessible on the web. Which of the following commands will accomplish this task?

  A. chmod 000 /var/www/html/old_reports

  B. chgrp root /var/www/html/old_reports

  C. chown apache /var/www/html/old_reports

  D. setenforce apache /var/www/html/old_reports

  Correct Answer: D

• Question 123:

  A Linux administrator wants to configure log messages of critical or higher severity levels from the cron utility to be logged to the console. Which of the following will accomplish this objective?

  A. Edit the /etc/logrotate.d/cron file to include the line cron.emerg.* /dev/console

  B. Edit the /etc/rsyslog.conf file to include the line cron.emerg.* /dev/console

  C. Edit the /etc/logrotate.conf file to include the line cron.emerg.* /dev/console

  D. Edit the /etc/rsyslog.d/conf file to include the line cron.emerg.* /dev/console

  Correct Answer: B

• Question 124:

  A company wants to provide internal identity verification services for networked devices. Which of the following servers should be installed?

  A. SSH

  B. VPN

  C. CA

  D. DHCP

  E. DNS

  Correct Answer: C

• Question 125:

  A Linux administrator is adding a static IP address to a network interface on a Linux system. The administrator modifies the ifcfg- eth0 configuration file with the following settings:

  

  After the administrator restarts the Linux server, the system is not connected to the network. Which of the following configuration settings needs to be changed?

  A. Set BOOTPROTO to BOOTP and USERCTL to yes.

  B. Set BOOTPROTO to NONE and ONBOOT to yes.

  C. Set USERCTL to yes and ONBOOT to no.

  D. Set NETMASK to 255.255.0.0 and ONBOOT to yes.

  Correct Answer: D

  Reference: https://www.tecmint.com/set-add-static-ip-address-in-linux/

• Question 126:

  Joe, a user, reports that he is no longer able to write files to his home directory. Upon inspection, the Linux administrator discovers that attempting to create a new file gives the following error: No space left on device. However, the disk and partition are not full. Which of the following commands would be BEST for the administrator to use to continue troubleshooting this problem?

  A. rm -Rf ~/.*

  B. fsck -y /dev/sda1

  C. df -i

  D. fdisk /dev/sda

  Correct Answer: C

  Reference: https://www.linuxtechi.com/11-df-command-examples-in-linux/

• Question 127:

  A systems administrator installs a simple package, but the Linux system returns the following error: rpmdb open fails. To verify if there is a problem in the RPM database, the systems administrator runs the following command:

  

  Which of the following commands should the systems administrator run NEXT to resolve this issue?

  A. cd/var/lib/rpm; rpm --rebuilddb ; rm -f _db*; yum clean all

  B. cd/var/lib/rpm; rpm -qd; rpm --rebuilddb; yum clean all

  C. cd/var/lib/rpm; rpm -qa; rm -f _db*; yum clean all

  D. cd/var/lib/rpm; rm -f _db*; rpm --rebuilddb; yum clean all

  Correct Answer: C

• Question 128:

  An administrator is uncomfortable allowing users to log in as root. Which of the following ensures that root logins are disallowed?

  A. usermod -L root

  B. usermod -G root

  C. usermod -B root

  D. usermod -U root

  Correct Answer: B

  Reference: https://web.mit.edu/rhel-doc/4/RH-DOCS/rhel-sg-en-4/s1-wstation-privileges.html

• Question 129:

  A systems administrator wants to mount an ISO to access its content. Using /mnt as a mount point, which of the following is the correct syntax?

  A. mount -o iso9660 /dev/sr0 /mnt

  B. mount -o loop -t iso /mnt

  C. mount -o loop /tmp/image.iso /mnt

  D. mount -o loop /dev/kvm /mnt

  Correct Answer: D

  Reference: https://www.cyberciti.biz/tips/how-to-mount-iso-image-under-linux.html

• Question 130:

  A systems administrator is troubleshooting an intermittent network connection at the IP address 192.168.1.23. The administrator wishes to monitor the connection at five-minute intervals for one hour. Which of the following commands will accomplish this task?

  A. ping -i 5 192.168.1.23

  B. ping -c 12 192.168.1.23

  C. ping -c 12 -i 300 192.168.1.23

  D. ping -c 60 -i 100 192.168.1.23

  Correct Answer: B

  Reference: https://linuxize.com/post/linux-ping-command/