The system that allows data entry and lets the computer communicate with the outside world (BIOS) is found in what type of memory?

The correct choice is ROM because the Basic Input/Output System (BIOS) is a firmware that serves as the bridge between the computer's hardware and the operating system. It is essential for booting the computer and managing data flow between the operating system and connected devices. ROM, which stands for Read-Only Memory, is non-volatile storage, meaning it retains its contents even when the power is turned off. This characteristic is crucial for BIOS, as it must always be available when the computer powers on to initialize the hardware and load the operating system.

While RAM is volatile and loses its contents when the power is turned off, making it unsuitable for storing the BIOS. Flash memory is also non-volatile but is typically used for purposes like data storage in USB drives or SSDs rather than firmware. Cache memory, which is a smaller and faster type of volatile memory, is used to speed up access to frequently used data but does not hold the BIOS. Therefore, the presence of the BIOS in ROM allows it to perform its essential role reliably throughout the life of the computer.