CompTIA CompTIA Certifications XK0-004 Questions & Answers

• Question 161:

  A systems engineer scheduled an at job that will reboot a critical server. A developer states the processes will not complete for another three hours. Which of the following will help the systems engineer to remove the job?

  A. atq atrm

  B. at -q atrm

  C. atq atrm

  D. at -q atrm

  Correct Answer: C

• Question 162:

  The following tools help maintain consistency across different systems in an infrastructure:

  SUSE Manager

  Red Hat Satellite

  Spacewalk

  If a system file is changed, the tools roll back the file to a predefined configuration.

  Which of the following concepts BEST describes this behavior?

  A. Build automation

  B. Infrastructure as code

  C. Automated configuration management

  D. Agentless system management

  Correct Answer: A

• Question 163:

  Which of the following default files are typically used to contain a list of public keys from other computers? (Choose two.)

  A. ~/.ssh/authorized_keys

  B. ~/.ssh/config

  C. ~/.ssh/id_dsa.pub

  D. ~/.ssh/known_hosts

  E. ~/.ssh/id_rsa

  F. ~/.ssh/id_rsa.pub

  Correct Answer: EF

• Question 164:

  Which of the following techniques would BEST allow a client computer to connect to a server that is not normally accessible because the server's application port is blocked by a firewall?

  A. X11 forwarding

  B. TCP wrappers

  C. RDP

  D. SSH port forwarding

  Correct Answer: D

• Question 165:

  An administrator is using a configuration management tool to define a system's configuration. The defined configuration can be used to provision new systems, rebuild existing systems, or roll back systems to their original baseline configurations.

  Which of the following BEST describes what the administrator is doing?

  A. Build automation

  B. Containerization

  C. Infrastructure as code

  D. Test automation

  Correct Answer: D

• Question 166:

  When a technician plugs a USB flash drive into a server, the drive does not mount automatically. Which of the following commands will provide the information needed to mount the drive manually?

  A. modinfo

  B. lshw

  C. lspci

  D. mount

  Correct Answer: D

• Question 167:

  A Linux administrator has downloaded the network-tools-12.1-17.i386.rpm package for installation to a local system. The administrator issues the rpm -ivh nerwork-cools-12.1-17.i386.rpm command to install the package. After attempting to use the newly installed package, the administrator realizes the package for the system's architecture was not installed correctly.

  Which of the following commands should the administrator use to remove the package from the system?

  A. rpm -e network-tools

  B. rpm -U network-tools-12.1-17.i386.rpm

  C. rpm -ivh network-tools-12.1-17.i686.rpm

  D. rpm -r network-tools

  Correct Answer: A

• Question 168:

  A newly installed desktop is unable to connect to networked resources. The systems administrator executes various commands and reviews the following output snippets:

  

  Which of the following should the systems administrator try NEXT to restore connectivity?

  A. arp -s 20:ad:1f:ab:10:0f 192.168.1.10

  B. route add -net 192.168.1.0 netmask 255.255.255.0

  C. dig -x @127.0.0.1 192.168.1.10

  D. ip link set wlo1 up

  E. killall -HUP NetworkManager

  Correct Answer: D

• Question 169:

  A Linux administrator is checking connectivity between two servers in separate subnets:

  Server A: 10.1.2.20 (source)

  Server B: 10.2.1.10 (destination on port 8080)

  The administrator tried to run the curl 10.2.1.10:8080 command on server A and received the following output:

  curl: (7) Failed to connect to 10.2.1.10 port 8080: Connection refused.

  The administrator checked on server B and confirmed nothing is listening on port 8080.

  Which of the following commands, when run on server B, would have allowed the administrator to test the connection successfully?

  A. tcpdump ‘tcp port 8080’

  B. ss -l -p dport=8080 dst 10.2.1.10

  C. nc -l -p 8080 10.2.1.10

  D. nmap -v -p 8080 10.2.1.10

  Correct Answer: D

• Question 170:

  A Linux administrator has downloaded and installed the httpd package.

  Which of the following commands will start the service immediately and allow the service to start on system boot?

  A. systemctl start httpd;chkconfig httpd on

  B. systemctl status httpd;chkconfig httpd on

  C. systemctl.start httpd;chkconfig httpd on

  D. systemctl start httpd;chkconfig httpd on 6

  Correct Answer: A