Discussion
How does Flash EEPROM erase data differently from traditional EEPROM?
Answer: B
Flash EEPROM erases a block or the entire chip at once.
Traditional EEPROM is electrically erased one byte at a time. Flash memory is a type of EEPROM designed to erase whole blocks (or the full chip) in a single operation, which makes it much faster for large rewrites and is why it is called flash.
Erasing one byte at a time describes ordinary EEPROM, the very thing the question contrasts. Ultraviolet light is used to erase EPROM, not EEPROM or flash. Flash memory can be erased and rewritten many times, so 'cannot be erased' is wrong.
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