CompTIA Linux+

A Linux administrator needs to switch from text mode to GUI. Which of the following runlevels will start the GUI by default?

A junior systems administrator is configuring localization option environment variables. The administrator is given a checklist of tasks with the following requirements:
✑ View current settings of the LC_ALL environment variable only.
✑ Modify the LANG environment variable to US English Unicode.
Given this scenario, which of the following should be performed to meet these requirements? (Choose two.)

An administrator needs to change the IP address on a server remotely. After updating the configuration files, a network restart is needed. However, the administrator fears that when the network connection drops, the network restart script will be killed before the new IP address has been set.
Which of the following commands would prevent the script from being killed?

A Linux administrator is testing a new web application on a local laptop and consistently shows the following 403 errors in the laptop's logs:

The web server starts properly, but an error is generated in the audit log. Which of the following settings should be enabled to prevent this audit message?

Which of the following BEST describes the purpose of the X11 system?