Which of the following is a feature of firmware?

Firmware is a specific type of software that is closely tied to hardware and is typically stored in non-volatile memory. This characteristic is essential because non-volatile memory retains its content even when the power is turned off, which is fundamental for firmware to function properly. Firmware often provides the low-level control for a device's specific hardware, enabling it to operate with the necessary instructions even after restarting.

In contrast, the other features described do not align with firmware. Regular updates relate more to software applications that require frequent changes for improvements, security patches, or new features, whereas firmware is generally more stable and may only require updates when significant changes are made to the hardware or its functionality. The volatility of firmware is not applicable as it is specifically designed to be non-volatile. Lastly, firmware is not typically edited directly by users; rather, it is usually provided by manufacturers and updated through specific tools or processes. Therefore, the focus on non-volatile memory is a critical defining feature of firmware.