CDC 3D152 Ure Volume 1

69 Questions | Total Attempts: 304

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3D152 Quizzes & Trivia

This is a quiz designed for all the network specialists and nerds out there. If you want to test your knowledge on this particular bunch of networking diagram facts take this quiz and find out how vast your knowledge is.


Questions and Answers
  • 1. 
    What is an example of analog-to-digital and digital-to-analog techniques?
    • A. 

      A. Amplitude modulation (AM) and frequency modulation (FM).

    • B. 

      B. Pulse code modulation (PCM) and frequency shift keying (FSK).

    • C. 

      C. Phase modulation (PM) and quadrature phase shift keying (QPSK).

    • D. 

      D. Pulse code modulation (PCM) and continuously variable slope delta (CVSD) modulation.

  • 2. 
    What converts analog signal information into an analog carrier signal?
    • A. 

      A. Delta modulation (DM).

    • B. 

      B. Digital modulation.

    • C. 

      C. Analog modulation.

    • D. 

      D. Adaptive modulation.

  • 3. 
    What converts analog signal information into a digital carrier signal?
    • A. 

      A. Delta modulation (DM).

    • B. 

      B. Analog modulation.

    • C. 

      C. Digital modulation.

    • D. 

      D. Adaptive modulation.

  • 4. 
    The information-carrying components that occur on either side of a carrier are called
    • A. 

      A. sidebands.

    • B. 

      B. sine waves.

    • C. 

      C. frequency translators.

    • D. 

      D. modulating frequencies.

  • 5. 
    Amplitude modulation (AM) requires a bandwidth that is
    • A. 

      A. twice that of the modulating signal.

    • B. 

      B. half that of the modulating signal.

    • C. 

      C. twice that of the carrier signal.

    • D. 

      D. half that of the carrier signal.

  • 6. 
    The upper sideband in a single-sideband suppressed carrier (SSBSC) modulation is eliminated by
    • A. 

      A. filtering.

    • B. 

      B. detection.

    • C. 

      C. compression.

    • D. 

      D. companding.

  • 7. 
    We can express the 6-to-1 improvement of the single-sideband suppressed carrier (SSBSC) modulation over conventional amplitude modulation (AM) as
    • A. 

      A. 2 decibels (dB) of improvement.

    • B. 

      B. 4 dB of improvement.

    • C. 

      C. 6 dB of improvement.

    • D. 

      D. 8 dB of improvement.

  • 8. 
    The only basic waveform in nature is a
    • A. 

      A. carrier wave.

    • B. 

      B. pure sine wave.

    • C. 

      C. resultant wave.

    • D. 

      D. composite wave.

  • 9. 
    A modulated waveform that contains a carrier plus two sidebands for each modulation frequency is a description of
    • A. 

      A. a phase modulation (PM).

    • B. 

      B. a pulse modulation.

    • C. 

      C. a frequency modulation (FM).

    • D. 

      D. an amplitude modulation (AM).

  • 10. 
    If 100 percent modulation is exceeded and there is distortion in the modulating signal, additional sidebands are generated. We identify these sidebands as what?
    • A. 

      A. Transmitted intelligence.

    • B. 

      B. Intensity of speech.

    • C. 

      C. Composite waves.

    • D. 

      D. Splatter.

  • 11. 
    The amount of deviation in a frequency modulation (FM) signal is directly proportional to the modulating signal's
    • A. 

      A. phase.

    • B. 

      B. amplitude.

    • C. 

      C. frequency.

    • D. 

      D. amplitude and frequency.

  • 12. 
    The amount of phase shift in a phase modulation (PM) signal is directly proportional to the 
    • A. 

      A. modulation index.

    • B. 

      B. rate of phase shift.

    • C. 

      C. frequency of the modulating signal.

    • D. 

      D. amplitude of the modulating signal.

  • 13. 
    What form of modulation is insensitive to signal variations?
    • A. 

      A. Delta

    • B. 

      B. Frequency shift keying (FSK).

    • C. 

      C. Pulse-amplitude modulation (PAM).

    • D. 

      D. Binary-phase sift keying or bi-phase shift keying (BPSK).

  • 14. 
    In quadrature-phase shift keying (QPSK) the radio frequency (RF) bandwidth for a quadriphase signal is what of that required by a bi-phase signal, given the same data rate.
    • A. 

      A. four times.

    • B. 

      B. double.

    • C. 

      C. half.

    • D. 

      D. the same.

  • 15. 
    What is the main advantage of differential phase shift keying (DPSK)?
    • A. 

      A. Carrier presence is required to detect changes.

    • B. 

      B. It requires a less complex receiver than a basic phase shift keying (PSK) signal.

    • C. 

      C. It requires a more complex receiver than a basic PSK signal.

    • D. 

      D. The demodulator needs to detect changes in absolute phase values.

  • 16. 
    Which of the following is not considered an analog modulation techniques?
    • A. 

      A. pulse-amplitude modulation (PAM).

    • B. 

      B. pulse-duration modulation (PDM).

    • C. 

      C. pulse-position modulation (PPM).

    • D. 

      D. pulse-code modulation (PCM).

  • 17. 
    The form of pulse modulation in which the pulse is varied within a set range of positions is known is
    • A. 

      A. pulse-amplitude modulation (PAM).

    • B. 

      B. pulse-duration modulation (PDM).

    • C. 

      C. pulse-position modulation (PPM).

    • D. 

      D. pulse-code modulation (PCM).

  • 18. 
    Quantized analog modulation is actually
    • A. 

      A. pulse-amplitude modulation (PAM).

    • B. 

      B. pulse-duration modulation (PDM).

    • C. 

      C. less tolerant of noise than frequency modulation (FM).

    • D. 

      D. analog-to-digital conversion.

  • 19. 
    How many bits per character of a 16-step pulse-code modulation (PCM) system are used to describe the quantized analog sample?
    • A. 

      A. 3.

    • B. 

      B. 4.

    • C. 

      C. 5.

    • D. 

      D. 8.

  • 20. 
    The process of coding pulse code modulation (PCM) quantized pulses to make them a constant duration and amplitude is
    • A. 

      A. encoding.

    • B. 

      B. companding.

    • C. 

      C. uniform quantizing.

    • D. 

      D. nonuniform quantizing.

  • 21. 
    In Time Division Multiplexing (TDM), the transmitting multiplexer will put a bit or a byte from each of the incoming lines into a specifically allocated what?
    • A. 

      A. channel.

    • B. 

      B. trunk.

    • C. 

      C. time slot.

    • D. 

      D. port.

  • 22. 
    The two major types of frame structures are
    • A. 

      A. low speed and high speed.

    • B. 

      B. high speed and EBCDIC.

    • C. 

      C. CCITT and low speed.

    • D. 

      D. EBCDIC and CCITT.

  • 23. 
    The method of multiplexing the T1 multiplexer uses is 
    • A. 

      A. frequency division.

    • B. 

      B. binary division.

    • C. 

      C. pulse division.

    • D. 

      D. time division.

  • 24. 
    Wave-division multiplexing (WDM) creates the virtual channels for multiplexing them together for transmission by using different
    • A. 

      A. wavelengths or lambdas.

    • B. 

      B. wavelengths or gammas.

    • C. 

      C. frequencies or lambdas.

    • D. 

      D. frequencies or gammas.

  • 25. 
    The most common wave-division multiplexing (WDM) system uses how many wavelengths?
    • A. 

      A. One wavelength.

    • B. 

      B. Two wavelengths.

    • C. 

      C. Three wavelengths.

    • D. 

      D. Four wavelengths.