DRAM

What does an error-correcting code (ECC) used in memory do?

  1. ACompresses data to increase capacity
  2. BAdds redundant bits to data to detect and correct bit errors
  3. CEncrypts data
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Answer: B. Adds redundant bits to data to detect and correct bit errors

ECC adds check bits to data so that errors can be detected and corrected when the data is read. To reduce the impact of soft errors and defects due to scaling, ECC is used in server memory, and DDR5 also builds ECC into the chip itself.

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More DRAM questions

  1. In DRAM, why is access time shorter when the same row (page) is accessed repeatedly?
  2. Why are high-k materials such as zirconium oxide used for the dielectric film of DRAM capacitors?
  3. Which correctly describes the self-refresh mode of DRAM?
  4. How much is an 8 Gbit DRAM chip in bytes?
  5. What does the CAS latency (CL) of DRAM mean?