Which statement about Moore's Law is accurate?

• A. Transistors double roughly every two years; pace slowed today
• B. Transistors double every year; pace unchanged
• C. CPU speed doubles every six months
• D. Law proven false

Answer: (C)

Moore's Law describes how the number of transistors on a chip tends to double over a roughly two-year period. This increase in transistor density has driven larger, more capable, and more energy-efficient chips, rather than saying anything about how fast a CPU's clock speed goes up. In practice, the exact two-year cadence has become less consistent in recent years as physical limits and manufacturing challenges arise, so the pace has slowed, but the idea that transistor count doubles about every two years remains the standard takeaway.

The other statements miss what Moore's Law addresses. Doubling transistor count every year is faster than historically observed, and CPU speed (clock rate) doubling every six months is about performance speed, not transistor density. Saying the law is proven false ignores that the trend toward greater transistor density has continued, just more slowly, rather than disappearing entirely.