ITPEC FE Morning April 2020 Question 21
ITPEC FE Morning April 2020 — Question 21 of 80
Flash Memory — non-volatile storage erased electrically in block units.
- •Flash = electrically erasable in blocks (evolved from EEPROM)
- •Non-volatile — retains data without power, no periodic refresh needed
Why not others:
- (a) Data must be rewritten periodically — describes DRAM (needs refresh cycles)
- (b) Used in cache memory of CPU — CPU cache uses SRAM, not flash (too slow)
- (d) Erased by ultraviolet rays — describes EPROM, not flash
Key memory type chain:
- EPROM → erased by UV light
- EEPROM → erased electrically, byte-by-byte
- Flash → erased electrically, block-by-block
- DRAM → volatile, needs periodic refresh
- SRAM → volatile, used in CPU cache, no refresh needed
AI-generated — may contain errors
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