Digital Communication System – 1 MCQ’s

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This set of Digital Communications Systems Multiple Choice Questions & Answers (MCQs) focuses on “Digital Communication System – 1″.

1. Digital communication system can handle
a) Analog signals
b) 1D signals
c) 2D signals
d) All of the mentioned

2. Which corrects the sampling time problem in a digital system?
a) Interpolator
b) Decimator
c) Equalizer
d) Filter

3. Matched filter technique is used to
a) Increase SNR
b) Decrease SNR
c) SNR is not affected
d) None of the mentioned

4. Wired channels are
a) Lossy
b) Lossless
c) Lossy & Lossless
d) None of the mentioned

5. What are the main features of a receiver?
a) Synchronization
b) Multiple parallel receiver chain
c) Synchronization & Multiple parallel receiver chain
d) None of the mentioned

6. What are the main features of a transmitter?
a) Higher clock speed
b) Linear power amplifier
c) Directional antennas
d) All of the mentioned

7. The information source of a digital communication system can be
a) Packetized
b) Continuous
c) Packetized & Continuous
d) None of the mentioned

8. The equivalent temperature in a receiver design must be kept
a) Low
b) High
c) Does not affect the receiver
d) None of the mentioned

9. Transmission media used for medium frequency band are
a) Coaxial cable
b) Copper cable
c) Optical fiber
d) All of the mentioned

10. Matched filter can also be used as least squares estimator.
a) True
b) False

11. What conditions must be fulfilled in a good digital communication system?
a) High data rate
b) High fidelity
c) Low transmit power
d) All of the mentioned

12. Transmission media used in low frequency band are
a) Air
b) Water
c) Copper cable
d) All of the mentioned

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