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Which is/are the basic refresh mode(s) for dynamic RAM?
Burst refresh
Distributed refresh
Open refresh
Burst refresh and distributed refresh
Answer: Option D
Burst refresh - a series of refresh cycles are performed one after another until all the rows have been refreshed, after which normal memory accesses occur until the next refresh is required. Distributed refresh - refresh cycles are performed at regular intervals, interspersed with memory accesses.
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