Which of the following memory types are nonvolatile? I. PROM II. SRAM II. EEPROM IV. DRAM

The memory types that are nonvolatile are I and III, PROM and EEPROM. Nonvolatile memory is a type of memory that retains its stored data even when the power is turned off. PROM (Programmable Read-Only Memory) is a type of nonvolatile memory that can only be written to once and then its contents are permanently fixed. EEPROM (Electrically Erasable Programmable Read-Only Memory) is similar to PROM, but allows for the data to be erased and rewritten multiple times. SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory) are types of volatile memory, which means that they lose their stored data when the power is turned off. So, the nonvolatile memory types are PROM and EEPROM.