Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 41
Q541:
The bit rate for HDTV can be reduced through _______.
A. higher resolution
B. compression
C. color depth increase
D. screen refresh rate decrease
Correct Answer:
B
Chapter: 41
Q542:
What is the average bit rate required to broadcast HDTV signals?
A. 20 to 40 Mbps
B. 5 to 10 Mbps
C. 10 to 20 Mbps
D. 50 to 100 Mbps
Correct Answer:
A
Chapter: 41
Q543:
A color pixel in HDTV is represented by _______ bits.
A. 12 bits
B. 16 bits
C. 24 bits
D. 32 bits
Correct Answer:
C
Chapter: 41
Q544:
The bit length for a digital signal is defined as _______.
A. the frequency of the signal
B. the time it takes for one cycle
C. the distance one bit occupies in the medium
D. the amplitude of the signal
Correct Answer:
C
Chapter: 41
Q545:
What factor influences the bit length of a digital signal?
A. the signal frequency
B. the signal bandwidth
C. the distance one bit occupies in the medium
D. the signal's amplitude
Correct Answer:
C
Chapter: 41
Q546:
If the screen is renewed 30 times per second, the bit rate for HDTV can be calculated by multiplying _______.
A. the pixel count by the screen resolution
B. the refresh rate by the pixel count
C. the color depth by the screen refresh rate
D. the pixel count by the color depth
Correct Answer:
B
Chapter: 41
Q547:
If a signal has a bit rate of 1000 bps, how many bits are transmitted in one second?
A. 10 bits
B. 100 bits
C. 1000 bits
D. 10000 bits
Correct Answer:
C
Chapter: 41
Q548:
In a communication channel, the bit rate affects _______.
A. the number of samples per second
B. the speed at which data is transferred
C. the signal frequency
D. the wavelength of the signal
Correct Answer:
B
Chapter: 42
Q549:
A digital signal, in the time domain, comprises _______.
A. vertical and horizontal line segments
B. only vertical line segments
C. only horizontal line segments
D. continuous sine waves
Correct Answer:
A
Chapter: 42
Q550:
Based on Fourier analysis, a digital signal is a composite _______.
A. analog signal
B. noise signal
C. digital signal
D. signal waveform
Correct Answer:
A
Chapter: 42
Q551:
In Fourier analysis, a vertical line in the time domain indicates _______.
A. a frequency of zero
B. a frequency of infinity
C. a frequency of 100 Hz
D. no frequency at all
Correct Answer:
B
Chapter: 42
Q552:
A horizontal line in the time domain represents _______.
A. a frequency of zero
B. a frequency of infinity
C. a constant signal
D. the highest possible frequency
Correct Answer:
A
Chapter: 42
Q553:
The transition from a frequency of zero to a frequency of infinity implies _______.
A. all frequencies in between are part of the domain
B. only the high frequencies are part of the domain
C. only the low frequencies are part of the domain
D. no frequencies are part of the domain
Correct Answer:
A
Chapter: 42
Q554:
The frequency range in a digital signal starts from _______ and goes to _______.
A. zero, infinity
B. one, ten
C. zero, ten
D. one, infinity
Correct Answer:
A
Chapter: 42
Q555:
In a digital signal, a vertical line in the time domain implies a frequency of _______.
A. zero
B. infinity
C. a range of frequencies
D. none of the above
Correct Answer:
B
Chapter: 42
Q556:
A digital signal's time domain representation uses _______ to show the composite nature of the signal.
A. vertical and horizontal lines
B. sine waves
C. square waves
D. constant lines
Correct Answer:
A
Chapter: 42
Q557:
The concept of "infinite bandwidth" in digital signals means that _______.
A. the signal contains all frequencies
B. the signal is purely sinusoidal
C. the signal has only a few frequencies
D. the signal is periodic
Correct Answer:
A
Chapter: 42
Q558:
Digital signals in the time domain comprise _______ to form the complete signal representation.
A. discrete line segments
B. smooth curves
C. continuous waveforms
D. periodic oscillations
Correct Answer:
A
Chapter: 42
Q559:
A digital signal’s frequency range is from _______ to _______ in Fourier analysis.
A. zero to infinity
B. one to ten
C. zero to ten
D. none of the above
Correct Answer:
A
Chapter: 42
Q560:
The vertical line in the time domain for a digital signal represents a frequency of _______.
A. zero
B. infinity
C. a specific low frequency
D. a specific high frequency
Correct Answer:
B