Question 38

Read-only memory (ROM) stores instructions for critical system activities.

Read-only memory (ROM) is a non-volatile storage medium that retains essential instructions necessary for the system's basic functions, even when the power is off. This includes firmware and other crucial system activities that ensure the computer can boot and operate properly.

A) Read-only memory (ROM)

This option is correct as ROM is specifically designed to store firmware and other critical instructions that are essential for the system's operation. Unlike other types of memory, the data in ROM cannot be easily modified or erased, ensuring the integrity of the instructions needed for system startup and hardware initialization.

B) Central processing unit (CPU)

While the CPU executes instructions and processes data, it does not store instructions itself. The CPU relies on memory components, such as ROM and RAM, to fetch the necessary instructions for operation. Therefore, this option is incorrect as it does not represent a storage medium.

C) Graphics processing unit (GPU)

The GPU is primarily responsible for rendering graphics and performing parallel processing tasks, but it does not store instructions for critical system activities. Its function is distinct from that of ROM, which specifically holds essential system firmware. Thus, this option is incorrect.

D) Random-access memory (RAM)

RAM is a volatile memory that temporarily holds data and instructions that the CPU is currently using or processing. However, it does not store critical system instructions permanently, as its contents are lost when the power is turned off. Therefore, this option is also incorrect.

Conclusion

Read-only memory (ROM) is the definitive choice for storing instructions essential for critical system activities, as it retains necessary data even without power. All other options, such as the CPU, GPU, and RAM, serve different functions and do not provide the permanent storage of critical instructions required for system operation.