Which statement best describes the difference between analog and digital signals?

  1. Digital signals vary continuously; analog signals have only two values
  2. Analog signals vary continuously; digital signals take only discrete values (e.g. 0 and 1)
  3. Both carry only binary values but at different voltages
  4. Analog signals are always faster than digital signals
Answer

B) Analog signals vary continuously; digital signals take only discrete values (e.g. 0 and 1)

An analog signal can take any value in a range (like a sound wave). A digital signal has a limited set of levels — in computers just 0 and 1. SLO CS-11-A-01 · Knowledge

Computer Science MCQ · More Unit 1: Computer Systems MCQs · Practise