XK0-004 Free Practice Test

A Linux administrator needs the “tech” account to have the option to run elevated commands as root. Which of the following commands would BEST meet this goal?

1. A. $ su – tech –c “/bin/bash”
2. B. # usermod –aG wheel tech
3. C. # sudo –I tech
4. D. # groupadd –u tech –g root

Correct Answer: C

A Linux systems administrator needs to provision multiple web servers into separate regional datacenters. The systems architect has instructed the administrator to define the server infrastructure using a specific tool that consumes a text-based file.
Which of the following is the BEST reason to do this?

1. A. To document the infrastructure so it can be included in the system security plan
2. B. To ensure the administrator follows the planning phase of the system development life cycle
3. C. To define the infrastructure so it can be provisioned consistently with minimal manual tasks
4. D. To validate user requirements have been met within each regional datacenter for compliance

Correct Answer: B

A Linux administrator needs to remotely update the contents of the www.comptia.org/contacts URL.
Which of the following commands would allow the administrator to download the current contents of the URL before updating?

1. A. curl www.comptia.org/contacts
2. B. dig www.comptia.org/contacts
3. C. apt-get www.comptia.org/contacts
4. D. yum list www.comptia.org/contacts

Correct Answer: A

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?

1. A. mtr
2. B. dig
3. C. netstat
4. D. route

Correct Answer: A

A Linux administrator has installed a web application firewall in front of a web server running on HTTP port 8080 and successfully started the HTTP server. However, after opening the application URL in an Internet browser, the administrator discovered that the application does not work. The administrator performed the following diagnostic steps:
Output of sysctl -a command:

Output of iptables -L command:

Output of netstat –nltop | grep "8080":

Which of the following is the NEXT step the administrator should perform to permanently fix the issue at the kernel level?

1. A. sysctl -w net.ipv4.ip_forward=1 then run sysctl -w /etc/sysctl.conf to enable the change
2. B. Edit /etc/sysctl.conf file and add net.ipv4.ip_forward = 1 then run sysctl -p /etc/ sysctl.conf to enable the change
3. C. Add iptables rule iptables -A INPUT -m state --state NEW -p tcp --dport 8080 -j then restart httpd daemon
4. D. Add iptables rule iptables -A FORWARD-m state --state NEW -p tcp --dport 8080 –j ACCEPT then restart httpd daemon

Correct Answer: D