Contains information such as the diagnostics and bootup routines. Cannot be accessed or changed.

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Multiple Choice

Contains information such as the diagnostics and bootup routines. Cannot be accessed or changed.

Explanation:
The key idea is memory that holds essential startup code and remains unchanged across power cycles. This meets the needs of diagnostics and boot routines because the system must reliably find and execute these instructions every time it starts, even before any operating system is loaded. That immutability and non-volatile nature come from ROM, which stores firmware that is designed to be read and used at boot and is not normally altered during regular operation. RAM is used for working data and loses its contents when power is removed, so it isn’t suitable for boot code. Flash memory and NVRAM can be rewritten, which means they aren’t inherently fixed in the same way as ROM; they don’t fit the description of “cannot be accessed or changed” in a typical sense.

The key idea is memory that holds essential startup code and remains unchanged across power cycles. This meets the needs of diagnostics and boot routines because the system must reliably find and execute these instructions every time it starts, even before any operating system is loaded. That immutability and non-volatile nature come from ROM, which stores firmware that is designed to be read and used at boot and is not normally altered during regular operation.

RAM is used for working data and loses its contents when power is removed, so it isn’t suitable for boot code. Flash memory and NVRAM can be rewritten, which means they aren’t inherently fixed in the same way as ROM; they don’t fit the description of “cannot be accessed or changed” in a typical sense.

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