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Which of the following is the correct representation of a digital signal?

easy📝 Factual Q3 of 15
Computer Networks - Physical and Data Link Layer
Which of the following is the correct representation of a digital signal?
AA smooth continuous wave
BA series of discrete steps or pulses
CA sine wave with varying amplitude
DA random noise pattern
Step-by-Step Solution
Solution:

  1. Step 1: Understand digital signal shape

    Digital signals appear as discrete steps or pulses representing binary values.

  2. Step 2: Compare with other options

    Smooth waves and sine waves represent analog signals; noise is not a valid signal form.

  3. Final Answer:

    A series of discrete steps or pulses -> Option B

  4. Quick Check:

    Digital signal shape = discrete steps [OK]
Quick Trick: Digital signals look like steps, not waves [OK]
Common Mistakes:
MISTAKES
  • Choosing smooth wave as digital
  • Confusing sine wave with digital
  • Selecting noise as signal

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