The correct answer is: D. All of the above
RAM (Random Access Memory) is a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is typically used to store data and instructions that the computer is actively using.
ROM (Read-Only Memory) is a type of computer memory that is permanently written to when the computer is manufactured. ROM is used to store essential system information, such as the BIOS (Basic Input/Output System), which is responsible for initializing the computer’s hardware and loading the operating system.
PROM (Programmable Read-Only Memory) is a type of ROM that can be programmed once, after which it cannot be changed. PROM is used to store firmware, which is software that is embedded in hardware.
RAM, ROM, and PROM are all types of computer memory. RAM is volatile memory, which means that it loses its contents when the power is turned off. ROM and PROM are non-volatile memory, which means that they retain their contents even when the power is turned off.
RAM is typically used to store data and instructions that the computer is actively using. ROM is used to store essential system information, such as the BIOS. PROM is used to store firmware.