The device used to carry digital data on analogue lines is called as                    ?

A. Modem
B. Multiplexer
C. Modulator
D. Demodulator
Correct Answer: A. Modem
Explanation:


The correct answer is Modem.



    • Meaning: Modem stands for Modulator-Demodulator.

    • Function: It converts digital data from a computer into analog signals for transmission over analog communication lines and converts incoming analog signals back into digital data.

    • Why Modem is Correct: Traditional telephone lines carry analog signals, while computers use digital data. A modem enables communication between these two systems.

    • Why Other Options Are Incorrect:

      • Multiplexer combines multiple signals into one transmission channel.

      • Modulator only converts digital signals into analog form.

      • Demodulator only converts analog signals back into digital form.




$s), while traditional infrastructure (like telephone lines) transmits continuous analog wave audio signals.
  • Step 2 (Signal Transition): The modem resolves this discrepancy by converting outgoing digital data into analog waves (modulation) and translating incoming analog signals back into binary code (demodulation).
  • Incorrect Options:
    • Multiplexer is incorrect because a multiplexer merges multiple independent data streams into a single high-speed transmission channel, rather than executing analog-to-digital transformations.
    • Modulator is incorrect on its own because it only covers half of the bidirectional communication cycle, representing the digital-to-analog outbound phase.
    • Demodulator is incorrect on its own because it only accounts for the incoming analog-to-digital processing phase.
  • “]$s), while traditional infrastructure (like telephone lines) transmits continuous analog wave audio signals.

  • Step 2 (Signal Transition): The modem resolves this discrepancy by converting outgoing digital data into analog waves (modulation) and translating incoming analog signals back into binary code (demodulation).
  • Incorrect Options:
    • Multiplexer is incorrect because a multiplexer merges multiple independent data streams into a single high-speed transmission channel, rather than executing analog-to-digital transformations.
    • Modulator is incorrect on its own because it only covers half of the bidirectional communication cycle, representing the digital-to-analog outbound phase.
    • Demodulator is incorrect on its own because it only accounts for the incoming analog-to-digital processing phase.
  • “]

    If you think there is any confusion in given MCQS You can comment.

    Follow us on WhatsApp

    Drop of Change Academy is Pakistan No.1 online Plate form to prepare all types of Exams including PPSC, FPSC, KPSC, SPSC, Ministry of Defence, And for all one paper MCQS , Pedagogy MCQS, docmcqs  general knowledge MCQS, current affair MCQS and alot more

     

     

    Leave a Comment

    Your email address will not be published. Required fields are marked *

    Scroll to Top