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Question 67Asked in UGC NET Computer Science, June 2016 (Paper II & III, Selected Questions)

Given the following statements: (1) Frequency division multiplexing is a technique that can be applied when the bandwidth of a link is greater than combined…

Given the following statements: (1) Frequency division multiplexing is a technique that can be applied when the bandwidth of a link is greater than combined bandwidth of signals to be transmitted. (2) Wavelength division multiplexing (WDM) is an analog multiplexing technique to combine optical signals. (3) WDM is a digital multiplexing technique. (4) TDM is digital multiplexing technique. Which of the following is correct?
  1. A(1), (2), (3) and (4) are true
  2. B(1), (2), (3) and (4) are false
  3. C(1), (2) and (4) are false (3) is true
  4. D(1), (2) and (4) are true (3) is false
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Correct answer: (D) (1), (2) and (4) are true (3) is false

Explanation

Multiplexing is of three types: (1) Frequency division multiplexing (FDM) – analog signals. (2) Wavelength division multiplexing (WDM) – analog signals (used in optical fiber). (3) Time division multiplexing (TDM) – digital signals; a single frame is made with interleaved digital signals from n devices. So (1), (2) and (4) are true and (3) is false.

From UGC NET Computer Science PYQ, June 2016 (Paper II & III, Selected Questions)

This is question 67 of UGC NET Computer Science PYQ, June 2016 (Paper II & III, Selected Questions). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.