Which capability distinguishes EEPROM memory from other memory types?

• A. It is a volatile memory that loses data when power is removed.
• B. It is a fast cache memory.
• C. It can be erased and rewritten by electrical signals.
• D. It stores only firmware.

Answer: (C)

The essential feature being tested is that EEPROM can be erased and rewritten by applying electrical signals. This capability makes it non-volatile, so data is preserved without power, and it can be updated after manufacture. That sets EEPROM apart from ROM types that are fixed at production and from volatile RAM, which loses data when power is removed. It also clarifies why it isn’t just a fast cache or limited to firmware: caches are designed for speed and temporary storage, while EEPROM is intended for long-term, rewritable storage. EPROMs require UV light to erase, whereas EEPROM can be erased electrically in place, allowing updates without removing the chip or exposing it to light.