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Question 19

In the SI, what does the prefix kilo mean when applied to bits?

  1. Either 1000 or 1024, depending on the manufacturer
  2. 1024, because computing counts in powers of two
  3. Exactly 1000, so one kilobit is 1000 bitsCorrect answer
  4. 1000 for storage and 1024 for memory

Explanation

SI prefixes always mean powers of ten and are never used for powers of two. A separate set of names exists for powers of two, such as kibi, symbol Ki, for 2¹⁰, so 1024 bits is one kibibit.

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Question 19: In the SI, what does the prefix kilo mean when applied to… · SI Units · Questena