CompTIA XK0-004 Online Practice Questions and Exam Preparation

CompTIA XK0-004 Online Questions & Answers

• Question 251:

  An administrator is tasked with increasing the size of the volume /dev/vg/lv to 20GB. Which of the following BEST illustrates the steps the administrator should take?

  A. vgextend -L20G /dev/vg/lv; resizelv /dev/vg/lv
  B. parted -L20G /dev/vg/lv; remount /dev/vg/lv
  C. mkfs -L20G /dev/vg/lv; tune2fs /dev/vg/lv
  D. lvextend -L20G /dev/vg/lv; resize2fs /dev/vg/lv
  D. lvextend -L20G /dev/vg/lv; resize2fs /dev/vg/lv

• Question 252:

  A Linux administrator is running a script that runs a Java application but receives the following error:

  Error: Java_Home is not set

  Java is installed on the Linux server and java -version returns a value.

  Which of the following should the administrator add to the script to resolve this issue?

  A. Export PATH-$PATH: $JAVA_HOME
  B. Echo `which java > $JAVA_HOME
  C. Export Java_Home which java
  D. Set JAVA_HOME -which java
  D. Set JAVA_HOME -which java

• Question 253:

  A systems administrator downloads an application's source files, compiles the application, and installs it per the application's installation instructions. When trying to run the application, the system states:

  $ occmd

  bash: occmd: command not found...

  Running the locate command shows it does exist in the following location:

  /opt/occmd/bin/occmd

  Which of the following should the administrator do to allow the command to run properly? (Choose two.)

  A. sudo ln -s /opt/occmd/bin/occmd /usr/local/bin/occmd
  B. echo "export PATH=$PATH:/opt/occmd/bin" >> ~/.bashrc
  C. mv /opt/occmd ~/ andand ln -s ~/occmd/bin/occmd ./occmd
  D. echo "#!/bin/bash \n ${which occmd}" > /usr/bin/occmd.sh
  E. sudo mv /opt/occmd/bin/occmd /etc/bin/
  F. cd /opt/occmd/bin andand chmod +x ./occmd andand restorecon -rv *
  E. sudo mv /opt/occmd/bin/occmd /etc/bin/
  F. cd /opt/occmd/bin andand chmod +x ./occmd andand restorecon -rv *

• Question 254:

  Which of the following is used on the client to boot a Linux system from a TFTP server?

  A. HTTP
  B. GRUB
  C. EFI
  D. PXE
  D. PXE

• Question 255:

  A Linux user wants to know the type A records for the domain foo.com. Which of the following commands will accomplish this task?

  A. dig type A domain foo.com
  B. nslookup set a foo.com
  C. nslookup set q A foo.com
  D. dig A foo.com
  D. dig A foo.com

  ---

  Reference: https://phoenixnap.com/kb/linux-dig-command-examples

• Question 256:

  A Linux administrator needs to configure a user account to notify the user ten days before the password will expire. Which of the following commands would BEST accomplish this task?

  A. chage
  B. vipw
  C. password
  D. usermod
  A. chage

• Question 257:

  A technician wants to secure a sensitive workstation by ensuring network traffic is kept within the local subnet. To accomplish this task, the technician executes the following command:

  echo 0 > /proc/sys/net/ipv4/ip_default_ttl

  Which of the following commands can the technician use to confirm the expected results? (Choose two.)

  A. tcpdump
  B. traceroute
  C. route
  D. iperf
  E. ip
  F. arp
  B. traceroute
  C. route

• Question 258:

  An administrator is setting UP a NAT gateway. Two interfaces have been configured:

  

  The firewall configuration has been completed:

  

  The IP forwarding configuration parameter is:

  

  When testing the NAT from a workstation, the administrator encounters an issue:

  

  Which of the following is the MOST likely cause of the packet loss?

  A. The MASQUERADE source and destination are in the incorrect order,
  B. The firewall is blocking the connection.
  C. The etho interface is wrong.
  D. IPv4 forwarding has not been enabled on the NAT gateway
  A. The MASQUERADE source and destination are in the incorrect order,

• Question 259:

  An administrator needs to allow additional specific users and groups to have access to a foWer without removing the original owner or group. Which of the following commands should the administrator use to complete this task?

  A. sentenforce
  B. setfac1
  C. chmod
  D. chown
  A. sentenforce

• Question 260:

  A Linux administrator is installing an NGINX-based proxy service on the same server that hosts the Apache-based HTTP services When the administrator launches the proxy service, the following error message is received:

  Address already in use: make_sock: could not bind to address 0.0.0.0:80

  The administrator runs the following commands to troubleshoot the issue and receives the following relevant output:

  

  Which of the following is the MOST likely issue?

  A. A FORWARD chain rule in iptables is missing
  B. An application is using port 80
  C. Apache is only listening on localhost:80
  D. The httpd is missing the proxy module
  B. An application is using port 80