When performing a file backup, what type of memory is saved?

For a file backup in the context of FANUC controls, the correct answer emphasizes the role of SRAM (Static Random Access Memory). When performing a backup, the data stored in SRAM is crucial because SRAM retains operational data, parameters, and program information that are actively used by the system.

Unlike F-ROM (Flash Read-Only Memory) or EEPROM (Electrically Erasable Programmable Read-Only Memory), which are typically used for permanent storage of firmware and non-volatile data, SRAM is volatile memory. This means it only holds data when powered on. Therefore, during operations, SRAM is frequently updated, making it vital to back up this memory to avoid loss of critical information during power outages or system failures.

Thus, the focus on backing up SRAM directly pertains to preserving the operational states and user-defined settings at the moment of the backup process. In this case, the other options do not emphasize the importance of SRAM in the backup process, as they either include memory types that are not typically backed up in the same way or are meant for different purposes entirely.