A _____ boot is when DOS is restarted without turning off the computer. A. warm B. reboot C. shutdown D. system up E. None of the above

The correct answer is: A. warm

A warm boot is a restart of a computer that is already powered on. It is also known as a soft reboot or a restart. To perform a warm boot, press the Ctrl+Alt+Del keys simultaneously.

A cold boot is a restart of a computer that is powered off. It is also known as a hard reboot or a power cycle. To perform a cold boot, press and hold the power button for 5 seconds.

A shutdown is the process of powering off a computer. To perform a shutdown, click the Start button, click the power icon, and then click Shut down.

A system up is the process of starting up a computer. To perform a system up, press the power button.

None of the above is a correct answer.