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Communication Fundamentals MCQs

Practice Communication Fundamentals MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1
Communication SystemsCommunication Fundamentals

The primary purpose of modulation in a communication system is to?

  • ATranslate a baseband signal to a suitable carrier frequency
  • BEliminate all noise completely
  • CMake information independent of bandwidth
  • DConvert every signal to DC
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Correct Answer: A. Translate a baseband signal to a suitable carrier frequency
Explanation: Modulation shifts information onto a carrier, enabling practical transmission, frequency allocation and efficient antennas.
Reference: Standard communication systems: communication fundamentals
Question 2
Communication SystemsCommunication Fundamentals

A basic electronic communication system normally consists of?

  • ATransmitter, channel and receiver
  • BOnly an oscillator and resistor
  • CRectifier, filter and regulator only
  • DMotor, generator and transformer
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Correct Answer: A. Transmitter, channel and receiver
Explanation: The basic communication chain contains a transmitter, a transmission medium or channel, and a receiver.
Reference: Standard communication systems: communication fundamentals
Question 3
Communication SystemsCommunication Fundamentals

The information signal before modulation is commonly called the?

  • ACarrier signal
  • BBaseband or message signal
  • CLocal oscillator signal
  • DIntermediate-frequency signal only
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Correct Answer: B. Baseband or message signal
Explanation: The original information-bearing signal is called the message or baseband signal.
Reference: Standard communication systems: communication fundamentals