CPUs and architecture

What is the period of a 1 GHz clock?

  1. A1 ms
  2. B1 µs
  3. C1 ns
Show answer and explanation

Answer: C. 1 ns

The period is the reciprocal of the frequency. 1 GHz = 10⁹ Hz, so the period is 1 / 10⁹ = 10⁻⁹ s = 1 ns. In that 1 ns, light travels only about 30 cm.

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