Question:
Which of the following memory units needs periodic refreshing?
Which of the following memory units needs periodic refreshing?
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DRAM = capacitor → needs refresh.
Updated On: Jul 2, 2026
- ROM
- EPROM
- Static ROM
- Dynamic RAM
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The Correct Option is D
Solution and Explanation
Concept:
Memory types differ based on data storage method.
Step 1: ROM/EPROM Non-volatile, no refresh needed.
Step 2: Static RAM (SRAM) Uses flip-flops → stable, no refresh.
Step 3: Dynamic RAM (DRAM) Uses capacitors to store charge.
Step 4: Charge leakage Capacitors lose charge over time → data loss.
Step 5: Conclusion Requires periodic refresh: \[ \boxed{\text{Dynamic RAM}} \]
Final Answer: \[ \boxed{(D)} \]
Step 1: ROM/EPROM Non-volatile, no refresh needed.
Step 2: Static RAM (SRAM) Uses flip-flops → stable, no refresh.
Step 3: Dynamic RAM (DRAM) Uses capacitors to store charge.
Step 4: Charge leakage Capacitors lose charge over time → data loss.
Step 5: Conclusion Requires periodic refresh: \[ \boxed{\text{Dynamic RAM}} \]
Final Answer: \[ \boxed{(D)} \]
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