Which of the following configuration files should be modified to disable Ctrl-Alt-Del in Linux?

After starting a long-running script, a systems administrator needs to verify the frequency of what is filling up the
/var partition and kill it because it is consuming too much space.
Which of the following is the correct sequence given only a terminal is available?
1. CTRL-C

An engineer is working on a production application deployment that requires changing a web application property file called server.property that is managed by the Git version control system. A cloned copy of the remote repository in which the server.property file exists is on the local desktop computer. The engineer makes appropriate changes to the files, saves it as server.property, and executes git commit -m "changed the property file" server.property. Which of the following commands did the engineer fail to perform?

A networked has been crashing intermittently. A Linux administrator would like to write a shell script that will attempt to ping the server and email an alert if the server fails to respond. The script will later be scheduled via cron job.
Which of the following scripts would BEST accomplish this task?

A systems administrator clones copies of a Linux VM every time a new Linux server is needed. The administrator notices the command prompt always states localhost.localdomain.
Which of the following should the administrator run to have the command prompt consistently labeled as Server1 rather than localhost.localdomain?