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

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 10
^{6}Hz - 20 x 10
^{3}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

You may be interested in:

Data Communication and Networking MCQs by Behrouz A Forouzan.

Computer Networking MCQs

Fundamental of Networking Online Tests

Data Communication and Networking Online Tests

Data Communication and Networking Short Questions Answers

Data Communication and Networking Tutorials and Study Notes