Which statement best describes ROM in a computer system?

Which statement best describes ROM in a computer system?

• A. ROM is non-volatile and stores firmware and essential startup instructions.
• B. ROM is volatile and used for temporary data.
• C. ROM stores the operating system in memory.
• D. ROM are high-speed caches for CPU.

Answer: (A)

ROM is non-volatile memory that retains data without power, making it ideal for storing firmware and essential startup instructions. This firmware contains the low-level code that initializes hardware and begins the boot process, such as the bootstrap or BIOS that runs when the computer starts. Because ROM preserves its contents even when the system is off, it provides a stable foundation for the initial startup tasks before the operating system loads. Think of what happens at power-up: the system needs something there to guide the hardware into a usable state every time you press the power button. That role belongs to firmware stored in ROM. In contrast, RAM is volatile and used for temporary data and active programs, not for permanent startup instructions. The operating system itself is loaded into RAM from storage, not kept in ROM, and CPU caches are small, fast storage used to speed up access to data and instructions, not for long-term or startup storage.

ROM is non-volatile memory that retains data without power, making it ideal for storing firmware and essential startup instructions. This firmware contains the low-level code that initializes hardware and begins the boot process, such as the bootstrap or BIOS that runs when the computer starts. Because ROM preserves its contents even when the system is off, it provides a stable foundation for the initial startup tasks before the operating system loads.

Think of what happens at power-up: the system needs something there to guide the hardware into a usable state every time you press the power button. That role belongs to firmware stored in ROM. In contrast, RAM is volatile and used for temporary data and active programs, not for permanent startup instructions. The operating system itself is loaded into RAM from storage, not kept in ROM, and CPU caches are small, fast storage used to speed up access to data and instructions, not for long-term or startup storage.