Multiple choice general knowledge science & technology

Technician A says that a digital signal is either on or off. Technician B says that an analog signal changes proportionally to the quantity measured. Who is correct?

  1. Technician A only

  2. Technician B only

  3. Both Technician A and B

  4. Neither Technician A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Technician A is correct because digital signals are binary, existing in only one of two states (on or off, 1 or 0). Technician B is also correct because analog signals vary continuously and proportionally to represent the measured quantity.

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