Data Communication Quiz | Data Communication Short Questions and Answers

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Questions
41 A(n)_________ signal is a composite analog signal with an infinite bandwidth.
A digital
B analog
C either (a) or (b)
D neither (a) nor (b)

Answer: digital
42 _____ signals can have an infinite number of values in a range.
A Analog
B Digital
C (a) or (b)
D None of the above

Answer: Analog
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43 What is the bandwidth of a signal that ranges from 1 MHz to 4 MHz?
A 1 KHz
B 3 MHz
C 4 MHz
D none of the above

Answer: 3 MHz
44 For a ______ channel, we need to use the Shannon capacity to find the maximum bit rate.
A noiseless
B noisy
C low-pass
D bandpass

Answer: noisy
45 _______ data have discrete states and take discrete values.
A Analog
B Digital
C (a) or (b)
D None of the above

Answer: Digital
46 A sine wave is ________.
A periodic and discrete
B aperiodic and discrete
C periodic and continuous
D aperiodic and continuous

Answer: periodic and continuous
47 Signals can be ________.
A digital
B analog
C either (a) or (b)
D neither (a) nor (b)

Answer: either (a) or (b)
48 ________ is a type of transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal.
A Noise
B Distortion
C Attenuation
D Decibel

Answer: Distortion
49 Data can be ________.
A digital
B analog
C (a) or (b)
D none of the above

Answer: (a) or (b)
50 Before data can be transmitted, they must be transformed to ________.
A periodic signals
B electromagnetic signals
C aperiodic signals
D low-frequency sine waves

Answer: electromagnetic signals
51 _______ signals can have only a limited number of values.
A Digital
B Analog
C (a) or (b)
D None of the above

Answer: Digital
52 The _________ product defines the number of bits that can fill the link.
A delay-amplitude
B frequency-amplitude
C bandwidth-period
D bandwidth-delay

Answer: bandwidth-delay
53 A _________ sine wave is not useful in data communications; we need to send a _______ signal.
A single-frequency; composite
B composite; single-frequency This is the correct answer.
C single-frequency; double-frequency
D none of the above

Answer: single-frequency; composite
54 When propagation speed is multiplied by propagation time, we get the ________.
A wavelength of the signal
B throughput
C distance a signal or bit has traveled
D distortion factor

Answer: distance a signal or bit has traveled
55 Frequency and period are ______.
A proportional to each other
B inverse of each other
C the same
D none of the above

Answer: inverse of each other
56 _______ data are continuous and take continuous values.
A digital
B analog
C (a) or (b)
D none of the above

Answer: analog
57 In a time-domain plot, the horizontal axis is a measure of ________.
A phase
B signal amplitude
C frequency
D time

Answer: time
58 If the bandwidth of a signal is 5 KHz and the lowest frequency is 52 KHz, what is the highest frequency?
A 5 KHz
B 47 KHz
C 57 KHz
D 10 KHz

Answer: 57 KHz
59 A sine wave in the ______ domain can be represented by one single spike in the _____ domain.
A time; phase
B frequency; time
C time; frequency
D phase; time

Answer: time; frequency
60 ________ is a type of transmission impairment in which the signal loses strength due to the resistance of the transmission medium.
A Distortion
B Attenuation
C Noise
D Decibel

Answer: Attenuation

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