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Q: In IT, the method for updating the main memory as soon as a word is removed from the cache is called
  • A. Write – through
  • B. Write- back
  • C. Protected-write
  • D. Cache-write
Correct Answer: Option B - The method for updating the main memory as soon as a word is removed from the cache is called write-back. Write back caches improve performance, because writing to the cache is faster than writing to main memory or disk.
B. The method for updating the main memory as soon as a word is removed from the cache is called write-back. Write back caches improve performance, because writing to the cache is faster than writing to main memory or disk.

Explanations:

The method for updating the main memory as soon as a word is removed from the cache is called write-back. Write back caches improve performance, because writing to the cache is faster than writing to main memory or disk.