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Which of the following memories needs refresh?
- a)SRAM
- b)DRAM
- c)ROM
- d)None of the above
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following memories needs refresh?a)SRAMb)DRAMc)ROMd)None ...
- DRAM (Dynamic Random-Access Memory) is a type of memory that needs to be refreshed periodically. It stores each bit of data in a separate capacitor within an integrated circuit. The charge on the capacitor leaks over time, causing the stored data to degrade. To prevent data loss, DRAM requires regular refreshing to recharge the capacitors and maintain the integrity of the stored information.
- In contrast, SRAM (Static Random-Access Memory) is a type of memory that does not require periodic refreshing. It uses flip-flops to store each bit of data, and as long as power is supplied, the stored data remains intact. SRAM is generally faster and more expensive than DRAM but does not need refreshing.
- ROM (Read-Only Memory) is a type of non-volatile memory that retains data even without power. It is programmed during manufacturing and does not require refreshing.
- Therefore, the memory that needs refreshing is specifically DRAM, making option (B) the correct choice.
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