Data Communication and Networking – Data Signals – Analog / Digital / Periodic / Aperiodic Signal MCQs

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 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

 
 
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