Where are basic input/output system (BIOS) settings saved?

The basic input/output system (BIOS) settings are saved in complementary metal oxide semiconductor (CMOS) memory. This type of non-volatile memory retains its data even when the computer is powered off, allowing BIOS settings to be preserved. CMOS memory is specifically designed for storing configuration settings and system parameters, such as system time, hardware settings, and boot options, which the BIOS uses to initiate the hardware during the boot process.

The other options are not suitable for saving BIOS settings. Cache is a high-speed storage area that temporarily holds frequently accessed data for faster retrieval, but it does not retain data when the power is off. Random access memory (RAM) is volatile memory, meaning it loses its contents when the computer is turned off, making it unsuitable for long-term storage of BIOS settings. Compact disc-read-only memory (CD-ROM) is used for data storage and retrieval systems but is not a location for storing BIOS configuration, as it is not writable and serves a different purpose.