SRAM and flash memory
Which correctly describes flash memory?
- AIt is non-volatile memory that retains data after power is removed
- BIt is volatile memory that loses data when power is removed
- CIt requires periodic refresh
Show answer and explanation
Answer: A. It is non-volatile memory that retains data after power is removed
Flash memory stores information by trapping electrons in a floating gate or charge-trap layer surrounded by insulators, so it is non-volatile and retains data after power-off. DRAM and SRAM are volatile and lose data when power is removed.
- A. Correct. Flash memory is non-volatile.
- B. DRAM and SRAM are the memories that lose data at power-off.
- C. DRAM is the memory that needs periodic refresh.