Q774
Which of the following memories needs refresh?
A.
SRAM
B.
DRAM
AnswerC.
ROM
D.
All of the above
E.
None of the above
Answer: Option B
Solution
Answer: Option B
Solution:
A DRAM cell is composed of an access transistor and a capacitor. Data is stored in the capacitor as electrical charge, but electrical charge leaks over time. Therefore, DRAM must be refreshed periodically to preserve the stored data.