A directory of Objective Type Questions covering all the Computer Science subjects.

1. Which of the following does not allow multiple uses or devices to share one communication line?
a. doubleplexer
b. multiplexer
c. concentrator
d. controller
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Answer: (a).doubleplexer

2. A communications device that combines transmissions from several I/O devices into one line is a 
a. concentrator
b. modifier
c. multiplexer
d. full-duplex line
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Answer: (c).multiplexer

3. The sharing of a medium and its link by two or more devices is called _______.
a. modulation
b. encoding
c. line discipline
d. multiplexing
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Answer: (d).multiplexing

4. Which multiplexing technique transmits analog signals?
a. FDM
b. TDM
c. WDM
d. Both (a) and (c)
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Answer: (d).Both (a) and (c)

5. Which multiplexing technique transmits digital signals?
a. FDM
b. TDM
c. WDM
d. None of the above
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Answer: (b).TDM

6. Which multiplexing technique shifts each signal to a different carrier frequency?
a. FDM
b. TDM
c. Both (a) and (b)
d. None of the above
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Answer: (a).FDM

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