Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

The uptime command is specifically designed to display how long the system has been running, along with current time, logged-in user count, and load averages. The top command also displays uptime prominently in its header line, making both valid tools for determining system run duration.

up is not a standard Linux command and will produce a 'command not found' error on a typical system.

top displays a continuously updated summary that includes uptime in the first header line, alongside load averages and task statistics, making it a valid secondary source for uptime information.

uname does not have a -u flag; it reports kernel name, hostname, and architecture details, but has no option to display uptime.

time is used to measure the execution duration of another command, and up is not a valid command, making this combination meaningless.