Which of the following is a common example of firmware in a PC?

Firmware refers to the low-level software programmed into the hardware devices of a computer that controls the device's hardware functionality. The BIOS (Basic Input/Output System) is a prime example of firmware in a PC. It is integral to the computer's startup process, initializing hardware components and loading the operating system.

Unlike an operating system, which is a higher-level software that manages hardware and provides services for application software, the BIOS operates at a more fundamental level, enabling the computer hardware to work together during the booting process. It is stored on a non-volatile memory chip on the motherboard, meaning it remains intact even when the power is turned off, which is characteristic of firmware.

The other options refer to software that operates on top of the firmware or performs different tasks than firmware does. An operating system is essential for managing system resources and user applications; an application suite refers to a collection of productivity software; and a file management system involves how files are organized and accessed on storage media. All of these options play important roles in a computer's operation, but they do not fit the specific definition of firmware as BIOS does.