Communication Basics MCQs

  1. What is the primary purpose of a communication system?
    A. To amplify signals
    B. To transfer information from one point to another
    C. To convert analog signals to digital signals
    D. To suppress noise

    Answer: B

  2. Which of the following is NOT a basic element of a communication system?
    A. Transmitter
    B. Channel
    C. Receiver
    D. Filter

    Answer: D

  3. The medium through which signals travel in a communication system is called:
    A. Receiver
    B. Transmitter
    C. Channel
    D. Antenna

    Answer: C

  4. Which of the following is an example of wireless communication?
    A. Telephone using landlines
    B. Satellite communication
    C. Fiber optic communication
    D. Ethernet cable transmission

    Answer: B

  5. In simplex communication, data flows:
    A. In both directions simultaneously
    B. In both directions, but one at a time
    C. In one direction only
    D. Alternating between two channels

    Answer: C

  6. Which of the following is an example of full-duplex communication?
    A. Radio broadcasting
    B. Walkie-talkie
    C. Telephone conversation
    D. Television broadcasting

    Answer: C

  7. A signal is defined as:
    A. Random noise added to the system
    B. A function conveying information
    C. A circuit element used for amplification
    D. None of the above

    Answer: B

  8. Which of the following reduces the quality of a communication signal?
    A. Amplification
    B. Noise
    C. Modulation
    D. Synchronization

    Answer: B

  9. The ratio of the signal power to the noise power is called:
    A. Signal-to-Noise Ratio (SNR)
    B. Noise Power Ratio (NPR)
    C. Modulation Index
    D. Gain

    Answer: A

  10. What is modulation?
    A. Amplification of a weak signal
    B. Encoding information onto a carrier wave
    C. Removing noise from a signal
    D. Converting digital signals to analog

    Answer: B

  11. Which of the following is NOT a type of modulation?
    A. Amplitude Modulation (AM)
    B. Frequency Modulation (FM)
    C. Wavelength Modulation (WM)
    D. Phase Modulation (PM)

    Answer: C

  12. Multiplexing allows:
    A. Increasing the power of a signal
    B. Multiple signals to share a single channel
    C. Conversion of analog signals to digital
    D. Signal detection

    Answer: B

  13. Which of the following is used for time-division multiplexing (TDM)?
    A. Analog signals
    B. Digital signals
    C. Both analog and digital signals
    D. Noise suppression systems

    Answer: B

  14. Which of the following is NOT a guided transmission medium?
    A. Coaxial cable
    B. Fiber optics
    C. Air
    D. Twisted pair cable

    Answer: C

  15. What is the primary advantage of optical fiber communication?
    A. High noise immunity
    B. Low cost
    C. Simple installation
    D. Large bandwidth capacity

    Answer: D

  16. Which type of wave is used in satellite communication?
    A. Sound wave
    B. Radio wave
    C. Light wave
    D. Seismic wave

    Answer: B

  17. Bluetooth technology operates in the:
    A. Microwave frequency range
    B. Infrared frequency range
    C. Ultraviolet frequency range
    D. Radio frequency range

    Answer: D

  18. Which of the following is used for short-range communication?
    A. Satellite communication
    B. Wi-Fi
    C. Cellular networks
    D. Optical fiber

    Answer: B

  19. Which of the following is an example of a broadcast communication system?
    A. Television
    B. Telephone
    C. Fiber optic communication
    D. Email

    Answer: A

  20. Which standard is used for cellular communication?
    A. Ethernet
    B. GSM (Global System for Mobile Communications)
    C. TCP/IP
    D. IEEE 802.11

    Answer: B

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