DRAM

Which correctly describes a property of DRAM?

  1. AIt is volatile memory that loses data when the power is turned off
  2. BIt is non-volatile memory that retains data when the power is turned off
  3. CIt is read-only memory that cannot be rewritten
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Answer: A. It is volatile memory that loses data when the power is turned off

DRAM stores information as charge on a capacitor and is volatile: when power is turned off, the charge is not maintained and the data is lost. Even with power on, the charge gradually leaks away, so refresh is needed. Non-volatile memories such as flash retain data without power.

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More DRAM questions

  1. What does 'DDR (double data rate)' in DDR SDRAM mean?
  2. In a DRAM cell array, which line connects to the gates of the cell transistors and selects the row to be read or written?
  3. How does the data retention time of DRAM cells generally change as temperature rises?
  4. Which correctly describes a soft error in memory?
  5. Compared with SRAM, which is a characteristic of DRAM?