Which characteristic describes ROM?

The characteristic that describes ROM, or Read-Only Memory, is that it is a chip that cannot be erased or rewritten under normal circumstances. ROM is a type of non-volatile memory, which means it retains the information stored on it even when the power is turned off. This property makes ROM useful for storing firmware or software that is closely tied to the hardware, such as the BIOS in a computer. This type of memory is designed for permanent storage, ensuring that essential instructions or data remain intact throughout the lifecycle of the device without the risk of accidental deletion or modification.

In contrast, other types of memory are designed for different functions. For example, chips that can be easily rewritten are typically characterized as RAM (Random Access Memory), which is used for temporary data storage while a device is operational. Additionally, volatile memory requires constant power to retain data, which is not the case with ROM. Finally, while ROM can be used in conjunction with temporary data processes, its primary function is not for temporary storage but for persistent, unchangeable data storage.