which of the following conditions does the system enter ROM monitor mode?

In which of the following conditions does the system enter ROM monitor mode? Each correct
answer represents a complete solution. Choose all that apply.

A.
The router does not have a configuration file.

B.
There is a need to set operating parameters.

C.
The user interrupts the boot sequence.

D.
The router does not find a valid operating system image.

Explanation:

The system enters ROM monitor mode if the router does not find a valid operating system image,
or if a user interrupts the boot sequence. From ROM monitor mode, a user can boot the device or
perform diagnostic tests.
Answer option A is incorrect. If the router does not have a configuration file, it will automatically
enter Setup mode when the user switches it on. Setup mode creates an initial configuration.
Answer option B is incorrect. Privileged EXEC is used for setting operating parameters.