Which variable defines the directories in which a Bash shell searches for executable commands?

What of the following can be done by the command ifconfig? (Choose TWO correct answers.)

Which of the following command sets the Bash variable named TEST with the content FOO?

Which of the following tools used for DNS debugging, reports not only the response from the name server but
also details about the query?

What happens after issuing the command vi without any additional parameters?

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing?
(Choose THREE correct answers.)

SIMULATION
Which port is the default server port for the HTTPS protocol? (Specify the port number using digits.)

SIMULATION
Which command, depending on its options, can display the open network connections, the routing tables, as
well as network interface statistics. (Specify ONLY the command without any path or parameters.)

Which of the following signals is sent to a process when the key combination CTRL+C is pressed on the
keyboard?

Which of the following statements is valid in the file /etc/nsswitch.conf?