This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Data Signal – Analog Digital and Periodic Aperiodic”.

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1. The _______ wave is the simplest analog signal.

  • sine
  • analog
  • digital
  • periodic

2. The sine wave is an example of _______ signal.

  • an analog
  • a digital
  • a composite
  • an aperiodic

3. A digital signal has a bit rate of 200 bps. The bit interval is _______ seconds

  • 0.005
  • 0.05
  • 0.5
  • 0.2

4. A digital signal has a bit rate of 50 Kbps. The bit interval is _______ microseconds

  • 200
  • 20
  • 2
  • 0.2

5. _______ signal repeats a pattern over and over again.

  • A digital
  • An analog
  • A periodic
  • An aperiodic

6. _______ signal has no repeating pattern.

  • A digital
  • An analog
  • A periodic
  • An aperiodic

7. The amplitude of a signal can be measured in _______

  • volts
  • amperes
  • watts
  • any of the above

8. On a time-domain plot, the _______ of a signal is the vertical value from a point on the curve to the x-axis

  • amplitude
  • period
  • frequency
  • phase

9. If the maximum value of a simple sine wave is 10 volts, the minimum value is _______ volts.

  • 10
  • 5
  • the square root of 10
  • - 10

10. If the maximum value of a simple sine wave is 10 volts, the voltage values _______.

  • range from 0 to 10, inclusive
  • are either 10 or -10
  • range from -10 to 10, inclusive
  • are integer values from -10 to 10

11. A simple sine wave completes one cycle in one microsecond. Its frequency is _______

  • 1 MHz
  • 1 æHz
  • 1 Hz
  • 1 THz

12. The period of a signal is usually expressed in _______

  • Hz
  • volts
  • seconds
  • radians

13. The frequency of a signal is usually expressed in _______

  • Hz
  • amperes
  • seconds
  • degrees

14. The _______ of a signal is usually expressed in Hz

  • amplitude
  • frequency
  • phase
  • voltage

15. The _______ of a signal is usually expressed in seconds.

  • amplitude
  • frequency
  • period
  • phase

16. The frequency of a signal is inversely related to its _______

  • amplitude
  • period
  • phase
  • any of the above

17. The _______ of a signal is its number of cycles per second.

  • amplitude
  • frequency
  • phase
  • any of the above

18. The _______ of a signal is the time it needs to complete one cycle.

  • amplitude
  • frequency
  • phase
  • period

19. The value of a simple sine wave at time zero is its maximum positive value. The phase shift is therefore _______ degrees.

  • 0
  • 90
  • 180
  • 270

20. The value of a simple sine wave at time zero is zero. The next value is negative. The phase shift is therefore _______ degrees.

  • 0
  • 90
  • 180
  • a or c

21. The value of a simple sine wave at time zero is zero. The next value is positive. The phase shift is therefore _______ degrees

  • 0
  • 90
  • 180
  • a or c

22. A nanosecond is _______ as long as a microsecond

  • 0.1
  • 0.01
  • 0.001
  • 0.0001

23. A picosecond is _______ as long as a nanosecond

  • 0.1
  • 0.01
  • 0.001
  • 0.0001

24. Ten thousand milliseconds equal _______.

  • one second
  • ten seconds
  • 0.1 seconds
  • 0.01 seconds

25. A signal with a frequency of 10 MHz has more cycles per second than a signal with a frequency of _______.

  • 10 KHz
  • 10 GHz
  • 10 THz
  • 1 THz

26. A signal with a period of 1 microsecond has a higher frequency than a signal with a period of _______

  • one millisecond
  • one nanosecond
  • one picosecond
  • none of the above

27. A signal with a period of 1 microsecond has a lower frequency than a signal with a period of _______

  • one millisecond
  • one picosecond
  • one nanosecond
  • b or c

28. The equivalent of 20 MHz is _______.

  • 20 x 106 Hz
  • 20 x 103 KHz
  • 20 x 10-3 GHz
  • all of the above

29. A signal with a frequency of 1 GHz has more cycles per second than a signal with a frequency of _______

  • one THz
  • two THz
  • one MHz
  • two GHz

30. A sine wave has a frequency of 10 Hz. Its period is _______

  • 10 seconds
  • 1 second
  • 0.1 second
  • 0.01 second

31. A sine wave completes one cycle in 20 seconds. Its frequency is _______

  • 5 Hz
  • 0.5 Hz
  • 0.05 Hz
  • 0.005 Hz

32. A signal has a constant value of 10 volts. Its frequency is _______ Hz.

  • zero
  • one
  • ten
  • five

33. A simple sine wave is offset one half cycle at time zero. This is a phase shift of _______ degrees

  • 0
  • 45
  • 90
  • 180

34. A simple sine wave completes one cycle in _______ degrees

  • 45
  • 90
  • 180
  • 360

35. A phase shift of 180 degrees is the same as a phase shift of _______ of a cycle

  • one quarter
  • one third
  • one half
  • three fourths

36. In a time-domain plot, signal amplitude is plotted against _______

  • frequency
  • period
  • time
  • phase

37. A time-domain plot shows signal _______ with respect to time.

  • amplitude
  • frequency
  • cycle
  • phase

38. In a frequency-domain plot, the signal amplitude of a simple sine wave is plotted against _______

  • phase
  • period
  • frequency
  • none of the above

39. In a frequency-domain plot of a composite signal consisting of twelve sine waves (all of different frequencies and amplitudes), there are _______ vertical bars

  • 2
  • 8
  • 12
  • 24

40. A signal with constant amplitude of ten volts has a frequency of _______

  • 0
  • 10
  • 20
  • indeterminate value

41. The _______ of a signal is the collection of all its component frequencies

  • amplitude
  • frequency spectrum
  • phase
  • bandwidth

42. The _______ of a signal is the width of its frequency spectrum

  • bandwidth
  • amplitude
  • phase
  • frequency

43. A signal is decomposed into two sine waves, one with a frequency of 10 Hz, the other with a frequency of 90 Hz. The bandwidth of the signal is _______ Hz

  • 10
  • 90
  • 100
  • 80

44. A signal is decomposed into three sine waves with frequencies of 10, 20, and 30 Hz. The bandwidth of the signal is _______ Hz

  • 10
  • 20
  • 30
  • 60

45. The bandwidth of a signal is 10 KHz. The frequency of the sine wave with the highest frequency is 11 KHz. The frequency of the sine wave with the lowest frequency is _______ Hz

  • 1
  • 10
  • 11
  • 21

46. The _______ is the time required to send one bit.

  • bit interval
  • bit rate
  • baud
  • frequency

47. The _______ is the number of bits sent in one second

  • bit interval
  • bit rate
  • baud
  • frequency

48. A bit interval of 0.1 seconds means a bit rate of _______bps

  • 0.1
  • 1
  • 10
  • 100

49. A bit interval of 10 milliseconds means a bit rate of _______bps.

  • 0.1
  • 1
  • 10
  • 100

Looking for more? Check out the below resources.

Data Communication and Networking MCQs by Behrouz A Forouzan
Computer Networking MCQs
Fundamentals of Networking Online Tests
Data Communication and Networking Online Tests
Data Communication and Networking Short Questions with Answers
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