Which of the following memory types requires constant refreshing to maintain its contents?

Question

BlackTom AI · Accepted Answer

The question asks which memory type needs constant refreshing to maintain its contents. 
Option a: ROM. Read-Only Memory retains data without power and does not require refreshing, so this is incorrect.
Option b: DRAM. Dynamic RAM stores each bit as a charge in a capacitor, which leaks over time; it requires periodic refresh cycles to preserve data. This is the correct understanding of why refreshing is needed.
Option c: SRAM. Static RAM uses flip-flops to hold bits and does not require refreshing, though it is faster and more power-hungry; thus this is incorrect.
Option d: Flash. Flash memory is non-volatile and retains data without continuous refreshing; it also has erase/write cycles, but it does not need constant refreshing, so this is incorrect.

Which of the following memory types requires constant refreshing to maintain its contents?单项选择题

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