Multiple choice

Which of the following options requires refreshing by an electric charge?

  1. ROM

  2. DRAM

  3. SRAM

  4. PROM
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DRAM (Dynamic RAM) stores each bit in a capacitor that holds an electric charge. Since capacitors gradually leak charge, DRAM requires periodic refreshing to rewrite the data and prevent information loss. SRAM uses flip-flops and doesn't need refreshing, while ROM and PROM are non-volatile memory types that retain data without power and don't require refreshing.

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