Multiple choice general knowledge science & technology

Which of the following memories needs refresh?

  1. SRAM

  2. DRAM

  3. ROM

  4. All of above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DRAM (Dynamic RAM) uses capacitive storage cells that leak charge over time, requiring periodic refresh cycles to maintain data integrity. SRAM uses flip-flop circuits (6 transistors per cell) that hold state as long as power is applied, so it never needs refresh. ROM is non-volatile and stores data permanently without requiring refresh. This makes DRAM the only memory type listed that fundamentally requires refresh operation.

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