Boot sector files, also known as the Master Boot Record (MBR), are an essential part of the system's startup process. They contain crucial information about the disk partitioning scheme and the operating system's location. These files are stored in the computer's Read-Only Memory (ROM).

ROM, also referred to as firmware, is a type of computer memory that retains its contents even when the power is turned off. It is non-volatile, meaning the stored data is persistent and cannot be easily modified or deleted. ROM is an integral part of the computer's hardware and is built into the motherboard or other peripheral devices.

ROM stores the boot sector files because it ensures that these critical files remain intact and accessible during the boot process. Placing them in ROM safeguards against accidental deletion or corruption, as well as any issues that may occur in other types of memory.

ROM is specifically designed for long-term storage and is not directly accessible by the CPU for read and write operations. Instead, it provides read-only access to the system during the boot process, allowing the computer to locate and load the necessary files to initiate the operating system.

By keeping the boot sector files in ROM, the computer can quickly access this information without relying on slower methods such as reading from a hard disk or other storage devices. This enables a faster and more reliable startup process, as the system can directly access the boot sector files from ROM.

In summary, the boot sector files of the system are stored in ROM because it provides non-volatile storage, ensuring the files remain intact and accessible during the boot process. Placing them in ROM allows for faster access and enhances the reliability of the system's startup procedure.