What is a common method to bypass a BIOS password?

• A. Removing the CMOS battery
• B. Remove all the system memory
• C. Removing the processor
• D. Login to Windows and disable the BIOS password

Answer: (A)

The concept being tested is how BIOS/CMOS password protection can be reset by clearing the stored settings in CMOS memory. In many systems, the BIOS password is kept in CMOS RAM, which holds firmware settings while the machine is powered off. Removing the CMOS battery disables power to that memory long enough for its contents to be cleared, effectively restoring the BIOS to factory defaults and erasing the password. After reattaching the battery and booting, you’ll typically need to reconfigure BIOS settings like boot order and date/time.

Why the other ideas don’t work here: removing all system memory doesn’t touch the firmware’s stored password and only affects volatile RAM used by the OS and applications; removing the processor has no impact on BIOS passwords; and trying to log in to Windows to disable the BIOS password operates at the OS level and cannot bypass a BIOS password, which is enforced before the system boots.