Test your knowledge :

  1. In _______ the phase of the carrier signal is varied based on the information in a digital signal.
    2. ASK
    PSK
    QAM
    FSK
  2. ______ vary continuously with time and have continuously varying amplitude for each time instant
    3. Analog signal
    Digital signal
    Discrete signal
    None of them
  3. In Digital Communication, information is transmitted in
    4. Analog form
    Digital form
    Discrete form
    None of them
  4. Data security is more in
    5. Analog Communication
    Digital Communication
    Both a & b
    None of them
  5. Digital Communication means .
    6. Analog data transmission
    Digital data transmission
    Data is not transmitted
    None of these
  6. In cable TV for the transmission of data channel used is
    7. Coaxial cable
    Optical fiber
    Twisted pair
    Free space broadcast
  7. Correlation receiver is used for the demodulation of the following scheme
    8. Coherent ASK
    Coherent PSK
    Coherent FSK
    all of them
  8. In QAM, both _____ and ____of carrier frequency are varied
    9. Phase and Amplitude
    Frequency and Amplitude
    Baud rate
    Frequency and Phase
  9. Which of the following is most affected by noise?
    10. ASK
    FSK
    QASK
    PSK
  10. If a carrier modulated by a digital bit stream has one of possible phases of o0 ,900 ,1800 ,2700 then the modulation is
    11. BPSK
    QPSK
    DPSK
    FSK
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